DIESEL EMISSIONS SERVICE OREGON – DIESEL TRUCK EMISSIONS

Diesel Emissions Service For Diesel Trucks & Fleets In Oregon

Trucks with the newer diesel emissions service technology include the DPF filters which need to be cleaned at regular intervals. Cummins Automotive & Diesel Service can service your aftertreatment system and clean your DPF with a thermal cleaning method to ensure a complete cleaning.

Buyer beware! If you are considering purchasing a diesel truck and operating it in the Portland metro area, be aware that older trucks do not have the diesel emissions service technology that Oregon State law and the Department of Environmental Quality (DEQ) require. Pre-2007 on-road diesel truck engines have no factory diesel emissions service equipment installed. For trucks operated in the Portland metro area, Oregon DEQ requires either diesel emissions retrofits to be installed and/or a 2010, or newer, engine to be installed. So, when you are looking for that “new to you” truck, keep these important facts in mind. When you do need diesel emissions service, Cummins Automotive & Diesel Service specializes in servicing on-road truck diesel emissions service equipment and aftertreatment systems.

If you have a municipal fleet of refuse trucks, dump trucks, delivery trucks, electric company service trucks, highway maintenance trucks, recycling trucks, city trucks, forest management trucks, or other trucks; diesel emissions service is a considerable portion of your expense budget to manage and the maintenance requirements may vary from the diesel trucks used in other industries, so there are many factors to consider. Cummins Automotive & Diesel Service can help you manage the federal EPA and Oregon DEQ emissions standards and requirements.

If you have a school truck fleet, diesel emissions service is a considerable portion of your school district’s expense budget. Managing the diesel emissions service maintenance requirements may vary from the diesel trucks used in other industries, so there are many factors to consider. Cummins Automotive & Diesel Service can help you manage the federal EPA and Oregon DEQ emissions standards and requirements.

A truck’s diesel engine emissions system functioning properly not only ensures it will pass government regulated inspections; it also ensures good fuel economy, optimal horsepower, and maximum truck performance. Cummins Automotive & Diesel Service can run diagnostics and check the emissions components on your diesel truck for needed maintenance to ensure your truck is operating at its peak emissions performance.

With computer diagnostic software and troubleshooting tools for Class 3 to Class 8 commercial trucks and for medium to heavy duty pickup trucks, the Cummins Automotive & Diesel Service technicians can get from fault to fix quicker than ever with fast and accurate repairs. Today’s diesel trucks are complex vehicles, incorporating an ever increasing lineup of components and electrical systems which can make service and maintenance a moving target. Computer diagnostics steady that target by simplifying repair procedures with detailed troubleshooting procedures, bi-directional tests, comprehensive data points, precise wiring diagrams, and accurate installation guides.

We do not waste time while diagnosing trucks. With a computer diagnostic interface that links to the truck, the connection is set to diagnose the ECU (Electronic Control Unit) and all components, find all relevant tests, review pertinent data points, and reference fault logics to enable technicians to diagnose root causes for the precise and accurate repair while also addressing other, symptom related issues. Superb bi-directional testing capability allows for the adjustment of engine parameters with the ability to run live component commands and tests. Additionally, our supplemental, symptoms based repair guides allow us to detect and repair the problem when the diagnostic tools are blind in the cases when there is not a fault code signifying the problem. With the capability to detect every issue on your truck, our diagnostics save you time and money.

Medium & Heavy Duty Engine Diesel Emissions Service Diagnostics

With computer diagnostics Cummins Automotive & Diesel Service can review data points and diagnose the diesel engine, and its accessory components to service the emissions and aftertreatment system for Caterpillar, Cummins, Detroit Diesel, Ford, GM, Isuzu, International, Mack, Mercedes Benz, Sprinter and Volvo.

Caterpillar Diesel Emissions Service – Heavy Duty Caterpillar Diesel Engines

With advanced computer diagnostics to provide diesel emissions service, Cummins Automotive & Diesel Service, with bi-directional testing, can access sensor data and review the data points with Caterpillar diesel engines, diagnose components, and read diagnostic fault and event codes to assess the current functional quality of the aftertreatment and emissions system on your truck.

Caterpillar Bi-Directional Testing Diagnostics & Diesel Emissions Service

Cylinder Cut Out Tests related to diesel emissions service for Caterpillar engine models 3126, C12, C18, C-15 pre-ACERT before 2004, EPA 04 Caterpillar engine models C7, C9, C13, C15 ACERT, and EPA 07 Caterpillar engine models C7, C13, and C15 ACERT.

Idle Shutdown, Idle Shutdown Time and Idle Shutdown Override tests related to diesel emissions service for Caterpillar engine models 3126, C12 and C18; Caterpillar engine model C-15 pre-ACERT before 2004; EPA 04 Caterpillar engine models C7, C9, C13, and C15 ACERT; EPA 07 Caterpillar diesel engine models C7, C13, and C15 ACERT.

Injection Actuator Pressure test related to diesel emissions service for Caterpillar engine model 3126; EPA 04 Caterpillar engine models C7, C9, C13, and C15 ACERT.

Injector Solenoid test related to diesel emissions service for Caterpillar engine models 3126, C12, and C18; Caterpillar diesel engine model C-15 pre-ACERT before 2004; EPA 04 Caterpillar diesel engine models C7, C9, C13, C15 ACERT; and EPA 07 Caterpillar diesel engine models C7, C13, and C15 ACERT.

Injector Trim Calibration related to diesel emissions service for Caterpillar diesel engine model C-15 pre-ACERT before 2004; EPA 04 Caterpillar diesel engine C7, C9, C13, and C15 ACERT.

Intake Valve Actuator test related to diesel emissions service for EPA 04 Caterpillar diesel engines C13 and C15 ACERT; EPA 07 Caterpillar diesel engines C13 and C15 ACERT.

Intake Valve Actuator Solenoid test related to diesel emissions service for EPA 04 Caterpillar diesel engines C13 and C15 ACERT; and for EPA 07 Caterpillar diesel engines C13 and C15 ACERT.

Parked DPF Service Regeneration related to diesel emissions service for EPA 07 Caterpillar diesel engines C7, C13, and C15 ACERT.

Cummins Inc. Diesel Emissions Service – Heavy Duty Cummins Diesel Engines

With advanced computer diagnostics to provide diesel emissions service, Cummins Automotive & Diesel Service, with bi-directional testing, can access sensor data and review the data points with Cummins Inc. diesel engines, diagnose components, read diagnostic fault and event codes, and read NOx sensor data on all EPA 13 and newer Cummins engines to assess the current functional quality of the aftertreatment and emissions system on your truck.

Cummins Inc. Bi-Directional Testing Diagnostics & Diesel Emissions Service

Aftertreatment Injector Flow, Injector Leak, and Injector Shutoff Valve test related to diesel emissions service for EPA 07 Cummins diesel engine model ISX 15L; EPA 10 Cummins diesel engine models ISX 12L and 15L; and EPA 13 Cummins diesel engine models ISX 12L and 15L.

Aftertreatment Maintenance Reset related to diesel emissions service for EPA 07 Cummins diesel engine models ISB, ISC, ISL, ISM, ISX, PX-6, and PX-8; EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6, and PX-8; EPA 13 Cummins diesel engine models ISB, ISL, ISX, PX-7, and PX-9; GHG17* Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9; and GHG21* Cummins diesel engine models B6.7, L9, X15, PX-7, and PX-9. (*GHG17/GHG21 – Meets 2017/2021 Greenhouse Gas EPA Requirements)

Cylinder Cut Out test related to diesel emissions service for EPA 02 Cummins diesel engine models ISB, ISC, ISL, ISM, and ISX; EPA 07 Cummins diesel engine models ISB, ISC, ISL, ISM, ISX, PX-6, and PX-8; EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6, and PX-8; EPA 13 Cummins diesel engine models ISB, ISL, ISX, PX-7, and PX-9; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7, and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7, and PX-9.

DEF Doser Pump Override test related to diesel emissions service for EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6 and PX-8; EPA 13 Cummins diesel engine models ISB, ISL, ISX 12L, ISX 15L and PX-7; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7, and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

DEF System Heater test related to diesel emissions service for EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6 and PX-8; EPA 13 Cummins deisel engine models ISB, ISL, ISX 12L, ISX 15L and PX-7; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

DEF System Leak test related to diesel emissions service for EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6 and PX-8; EPA 13 Cummins diesel engine models ISB, ISL, ISX 12L, ISX 15L, PX-7 and PX-9; GHG17 Cummins diesel engine models B6.7, L9, X12 and X15; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

DPF Service Regen related to diesel emissions service for EPA 07 Cummins diesel engine models ISB, ISC, ISL, ISM, ISX, PX-6 and PX-8; EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6 and PX-8; EPA 13 Cummins diesel engine models ISB, ISL, ISX, PX-7 and PX-9; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

Fuel Injector Calibration test related to diesel emissions service for EPA 07 Cummins diesel engine models ISC, ISL, ISX 12L, ISX 15L and PX-8 with common rail fuel systems; and EPA 10 Cummins diesel engine models ISC, ISL, ISX 12L, ISX 15L and PX-8 with common rail fuel systems.

Fuel Injector Performance test related to diesel emissions service for EPA 10 Cummins diesel engine models ISX 12 and ISX 15L; EPA13 Cummins deisel engine models ISX 12 and ISX 15L; GHG17 Cummins diesel engine models L9, X12 and X15; and GHG21 2019-2020 Cummins diesel engine models L9, X12 and X15.

Fuel Injector Reset test related to diesel emissions service for EPA 13 Cummins diesel engine models ISB, ISL, ISX, PX-7 and PX-9; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

Fuel Leakage test related to diesel emissions service for EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX 12L, ISX 15L, PX-6 and PX-8 with common rail fuel systems; EPA 13 Cummins diesel engine models ISB, ISL, ISX 12L, ISX 15L, PX-7 and PX-9 with common rail fuel systems; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9 with common rail fuel systems; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9 with common rail fuel systems.

Idle Shutdown, Idle Shutdown Status & Idle Shutdown Time parameters related to diesel emissions service for EPA 07 Cummins diesel engine models ISB, ISC, ISL, ISM, ISX, PX-6 and PX-8; EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6 and PX-8; EPA 13 Cummins diesel engine models ISB, ISL, ISX, PX-7 and PX-9; and GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

SCR Selective Catalyst Reduction Performance and System test related to diesel emissions service for EPA 13 Cummins diesel engine models ISB, ISL, ISX, PX-7 and PX-9; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

Vehicle Overspeed Trip Information parameters related to diesel emissions service for EPA 07 Cummins diesel engine models ISB, ISC, ISL, ISM, ISX, PX-6 and PX-8; EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6 and PX-8; EPA 13 Cummins deisel engine models ISB, ISL, ISX, PX-7 and PX-9; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

VGT Variable Geometry Turbocharger Electronic Actuator Installation and Calibration setup related to diesel emissions service for EPA 07 Cummins diesel engine models ISB, ISC, ISL, ISM, ISX, PX-6 and PX-8; EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX, PX-6 and PX-8; EPA 13 Cummins diesel engine models ISB, ISL, ISX, PX-7 and PX-9; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

VGT Variable Geometry Turbocharger Hysteresis test related to diesel emissions service for EPA 10 Cummins diesel engine models ISB, ISC, ISL, ISX 12L, ISX 15L, PX-6 and PX-8 with common rail fuel systems; EPA 13 Cummins diesel engine models ISB, ISL, ISX 12L, ISX 15L, PX-7 and PX-9 with common rail fuel systems; GHG17 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9 with common rail fuel systems; and GHG21 Cummins diesel engine models B6.7, L9, X15, PX-7 and PX-9.

Detroit Diesel Emissions Service – Heavy Duty Detroit Diesel Engines

With advanced computer diagnostics to provide diesel emissions service, Cummins Automotive & Diesel Service, with bi-directional testing, can access sensor data and review the data points with Detroit diesel engines, diagnose components, read diagnostic fault and event codes, and read NOx sensor data on all EPA 13 and newer Detroit engines to assess the current functional quality of the aftertreatment and emissions system on your truck.

Detroit Bi-Directional Testing Diagnostics & Diesel Emissions Service

Cylinder Cut Out test in relation to diesel emissions service for 2000 to 2017 Detroit diesel engine models 50, 55, 60, DD13, DD15 and DD16; GHG17 and newer Detroit diesel engine models with engine software versions App_040B, App_040D, App_040E, App_0410, App_0411, App_3105, App_3106, App_3107, App_2104, App_2105, App_2107, App_2108 and App_2109; and GHG17 Detroit diesel engine models with MCM Software Versions mcm_0x06DB, mcm_0x06DE, mcm_0x06F2, mcm_0x06ED and mcm_0x06EF.

So effective because the bad stuff can’t take the heat.™

DEF Diesel Exhaust Fluid Coolant Valve Control test for EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16; GHG17 Detroit diesel engine models with software versions App_040B, App_040D, App_040E, App_0410, App_0411, App_2104, App_2105, App_2107, App_2108, and App_2109; GHG17 Detroit diesel engine models with MCM software versions mcm_0x06DB, mcm_0x06DE, mcm_0x06ED, mcm_0x06EF, and mcm_0x06F2 or ACM Software Version acm_0x232, acm_0x236, acm__0x024E, acm_0x023E, and acm_0x0250.

DEF Diesel Exhaust Fluid Quantity test for EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16; GHG17 Detroit diesel engine models with software versions App_040B, App_040D and App_040E, App_0410, App_0411, App_3105, App_3106, App_3107, App_2104, App_2105, App_2107, App_2108, and App_2109; GHG17 Detroit diesel engine models with ACM Software Versions acm_0x232, acm_0x236, acm__0x024E, acm_0x023E, and acm_0x0250.

DOC Diesel Oxidation Catalyst Face Plug Cleaning of EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16; GHG17 Detroit diesel engine models with software versions App_040B, App_040D, App_040E, App_0410, App_0411; GHG17 Detroit diesel engine models with MCM software versions mcm_0x06DB, mcm_0x06ED, mcm_0x06DE, and mcm_0x06F2.

DPF Diesel Particulate Filter Ash Accumulator Reset on EPA 07 Detroit diesel engine models 60 and DD15; EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15, and DD16; GHG17 and newer Detroit diesel engine models DD5, DD8, DD13, DD15, and DD16 with Engine Software Versions App_040B, App_2104, App_040D, App_2105, App_040E, App_2107, App_0410, App_2108, App_0411, and App_2109; GHG17 and newer Detroit diesel engine models DD5, DD8, DD13, DD15, and DD16 with MCM Software Versions mcm_0x06DB, mcm_0x06ED, mcm_0x06DE, mcm_0x06EF, and mcm_0x06F2; GHG17 and newer Detroit diesel engine models DD5, DD8, DD13, DD15, and DD16 with ACM Software Versions acm_0x0232, acm_0x023E, acm_0x0236, acm_0x0250, and acm_0x024E.

DPF Diesel Particulate Filter Service Regen of EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16; GHG17 Detroit diesel engine models with software versions App_040B, App_040D, App_040E, App_0410, App_0411, App_3105, App_3106, App_3107, App_2104, App_2105, App_2107, App_2108, and App_2109.

Hydrocarbon Doser Purge with EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16; GHG17 Detroit diesel engine models with software versions App_040B, App_040D, App_040E, App_0410, App_0411, App_2104, App_2105, App_2107, App_2108, and App_2109; GHG17 Detroit diesel engine models with MCM software versions mcm_0x06DB, mcm_0x06DE, mcm_0x06F2, mcm_0x06ED and mcm_0x06EF.

Idle Shutdown, Idle Shutdown Status and Idle Shutdown Time for EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16; GHG17 Detroit diesel engine models with software versions App_040B, App_040D, App_040E, App_410, App_0411, App_2104, App_2105, App_2107, App_2108, and App_2109.

Intake Throttle Valve test for EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16.

Metering Unit Flood Routine with EPA 10 Detroit diesel engine models DD13, DD15 and DD16.

Parked SCR Efficiency test for EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16; GHG17 and newer Detroit diesel engine models with engine software versions App_040B, App_040D, App_040E, App_0410, App_0411, App_2104, App_2105, App_2107, App_2108, and App_2109; GHG17 Detroit diesel engine models with ACM software versions acm_0x0232, acm_0x0236, acm__0x024E, acm_0x023E, and acm_0x0250.

Performance Check Low Temp ATD for EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16; GHG17 and newer Detroit diesel engine models with engine software versions App_040B, App_040D, App_040E, App_0410, App_0411, App_2104, App_2105, App_2107, App_2108, and App_2109; GHG17 and newer Detroit diesel engine models with MCM software versions mcm_0x06DB, mcm_0x06DE, mcm_0x06F2, mcm_0x06ED, and mcm_0x06EF.

SCR Selective Catalyst Reduction Air Pressure System check on EPA 10 Detroit diesel engine models DD13, DD15 and DD16.

SCR Selective Catalyst Reduction Airless Doser System (ADS) Self Check on EPA 13 Detroit diesel engine models DD13, DD15 and DD16 engines; GHG17 and newer Detroit diesel engine models with engine software versions App_040B, App_040D, App_040E, App_0410, App_0411, App_2104, App_2105, App_2107, App_2108, and App_2109; GHG17 Detroit diesel engine models with ACM software versions acm_0x0232, acm_0x0236, acm_0x024E, acm_0x023E, acm_0x0250.

SCR Selective Catalyst Reduction System Output Component test for EPA 10 to EPA 13 Detroit diesel engine models DD13, DD15 and DD16 engines; GHG17 and newer Detroit diesel engine models with engine software versions App_040B, App_040D, App_040E, App_0410, App_0411, App_2104, App_2105, App_2107, App_2108, and App_2109; GHG17 Detroit diesel engine models with MCM Software Versions mcm_0x06DB, mcm_0x06DE, mcm_0x06F2, mcm_0x06ED, and mcm_0x06EF; GHG17 Detroit diesel engine models with ACM software versions acm_0x0232, acm_0x0236, acm_0x024E, acm_0x023E, and acm_0x0250.

International Diesel Emissions Service – Heavy Duty International Diesel Engines

With advanced computer diagnostics to provide diesel emissions service, Cummins Automotive & Diesel Service, with bi-directional testing, can access sensor data and review the data points with International diesel engines, diagnose components, read diagnostic fault and event codes, and read NOx sensor data on all EPA 13 and newer International engines to assess the current functional quality of the aftertreatment and emissions system on your truck.

International Bi-Directional Testing Diagnostics & Diesel Emissions Service

Aftertreatment AFT Fuel Shutoff Valve Actuator test for EPA 10 International diesel engine models Maxxforce 11, Maxxforce 13, and A26.

Aftertreatment (AFT) Fuel Doser Actuator test for EPA 10 International diesel engine models Maxxforce 11 and 13.

Engine Throttle Valve (ETV) Position Actuator test for EPA 10 International diesel engine models Maxxforce 11 and Maxxforce 13; and 2013 International diesel engine models N13 and A26.

Exhaust Gas Recirculation (EGR) Valve Position Actuator test for EPA 10 International diesel engine models Maxxforce 11 and Maxxforce 13; and 2013 International diesel engine models N13 and A26.

Exhaust Back Pressure Valve Actuator test for EPA 10 International diesel engine models Maxxforce 11 and Maxxforce 13; and 2013 International diesel engine model N13.

Aftertreatment Fuel Enable Actuator Leak test for International diesel engine model A26.

Aftertreatment Hydrocarbon Doser Leak test for International diesel engine model A26.

Aftertreatment Hydrocarbon Dosing System test for International diesel engine model A26.

Aftertreatment Reset for EPA 07 and EPA 10 International diesel engine models Maxxforce 11 and Maxxforce 13.

CDPF Reset for EPA 07 and EPA 10 International diesel engine models Maxxforce 7, DT, 9 and 10.

Cylinder Cut Out test for EPA 07 International diesel engine models Maxxforce 7, DT, 9, 10, 11, and 13; EPA 10 International diesel engine models Maxxforce 9, DT, 10, 11, and 13; International diesel engine models N9, N10, 2013 N13, 2015 N13, and A26.

DEF Diesel Exhaust Fluid Doser Pump Override test for International diesel engine models N9, N10, 2013 N13, and 2015 N13.

DOC/DPF Replacement Reset with International diesel engine models N9, N10, 2013 N13, 2015 N13; and International diesel engine model A26.

DPF Diesel Particulate Filter Service Regen of EPA 07 International diesel engine models Maxxforce 7, DT, 9, 10, 11, and 13; EPA 10 International diesel engine models Maxxforce 7, DT, 9, 10, 11, and 13; and International diesel engine models N9, N10, 2013 N13, 2015 N13 and A26.

Fuel Pressure Adaptive Reset of EPA 07 International diesel engine model Maxxforce 7; and EPA 13 International diesel engine model Maxxforce 7.

Idle Shutdown Time, Idle Shutdown Timer Mode, Engine Idle Shutdown Time, Idle Shutdown Time, No parking Brake Set and Idle Shutdown Time with Park Brake tests with EPA 07 International diesel engine models 7, DT, 9, and 10; EPA 13 International diesel engine models DT, 9, 10, 11, 13 and 15; EPA 13 International diesel engine models Maxxforce 7, 9, DT, 10, 11, and 13; and International diesel engine models N9, N10, N13, and A26.

KOEO Injector test for EPA 07 International diesel engine models Maxxforce 7, DT, 9, and 10; EPA 10 International diesel engine models Maxxforce DT, 9, and 10 engines; and International diesel engine models N9 and N10.

KOEO Standard test for EPA 07 International diesel engine models Maxxforce 7, DT, 9, and 10; EPA 10 International diesel engine models Maxxforce 7, DT, 9, and 10; and International diesel engine models N9, N10, and 2015 N13.

KOER Air Management test for EPA 07 International diesel engine models Maxxforce 7, DT, 9, and 10; EPA 10 International diesel engine models Maxxforce 7, DT, 9, 10, 11 and 13; EPA 13 International diesel engine model Maxxforce 7; and International diesel engine models N9, N10, 2015 N13 and A26.

KOER Standard test for EPA 07 to EPA 13 International diesel engine models Maxxforce 7, 9, and 10; and International diesel engine models N9 and N10.

SCR Fault Reset of International diesel engine models N9, N10, 2013 N13, and International diesel engine model A26.

Mack & Volvo Diesel Emissions Service – Heavy Duty Mack & Volvo Diesel Engines

With advanced computer diagnostics to provide diesel emissions service, Cummins Automotive & Diesel Service, with bi-directional testing, can access sensor data and review the data points with Mack and Volvo diesel engines, diagnose components, read diagnostic fault and event codes, and read NOx sensor data on all EPA 13 and newer Mack and Volvo engines to assess the current functional quality of the aftertreatment and emissions system on your truck.

Mack & Volvo Bi-Directional Testing Diagnostics & Diesel Emissions Service

Aftertreatment Injector Activation Flow test for EPA 07 Mack & Volvo diesel engine models.

Cylinder Cut Out test for EPA 07 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

DEF Dosing Valve test for EPA 10 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

DEF Pressure System test for EPA 10 Mack & Volvo diesel engine models; EPA 13 Mack & Volvo diesel engine models, and GHG17 Mack & Volvo diesel engine models.

DPF Service Regen of EPA 07 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

DPF System Reset of EPA 07 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

EGR Function test for EPA 07 Mack & Volvo diesel engine models and all major software versions of EPA 10 Mack & Volvo diesel engine models.

Fuel Shut-off Valve test for EPA 07 Mack & Volvo diesel engine models and all major software versions of EPA 10 Mack & Volvo diesel engine models.

Hydrocarbon Dosing Control Valve test for all major software versions of EPA 10 Mack & Volvo diesel engine models.

NOx Conversion Monitor test for EPA 13 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

Purge Air Valve test for all major software versions of EPA 10 Mack & Volvo diesel engine models.

SCR Regeneration of EPA 13 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

Idle Shut Down Time for EPA 07 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

VGT Electronic Actuator Installation and Calibration for EPA 13 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

VGT Function test for EPA 07 Mack & Volvo diesel engine models and all major software versions of EPA 10 Mack & Volvo diesel engine models.

VGT Monitor test for EPA 13 Mack & Volvo diesel engine models and GHG17 Mack & Volvo diesel engine models.

Warm Hold Function test for EPA 07 Mack & Volvo diesel engine models and EPA 10 Mack & Volvo diesel engine models.

Mercedes-Benz Diesel Emissions Service – Heavy Duty Mercedes-Benz Diesel Engines

With advanced computer diagnostics to provide diesel emissions service, Cummins Automotive & Diesel Service, with bi-directional testing, can access sensor data and review the data points with Mercedes-Benz diesel engines, diagnose components, read diagnostic fault and event codes, and read NOx sensor data on Mercedes-Benz diesel engines to assess the current functional quality of the aftertreatment and emissions system on your truck.

Mercedes-Benz Bi-Directional Testing Diagnostics & Diesel Emissions Service

Cylinder Cut Out test for EPA 07 Mercedes-Benz diesel engine models.

DPF Parked Regeneration for EPA 07 Mercedes-Benz diesel engine models.

A – Z | Oregon Cities Served – Truck Diesel Emissions Service

Cummins Automotive & Diesel Service will diagnose and repair your truck’s diesel emissions service needs in the Sherwood, Oregon shop and will dispatch mobile roadside service to diagnose and repair your truck’s diesel emissions service needs in the Oregon city of Ada, Oregon if you need DPF Diesel Particulate Filter cleaning, will run SCR Selective Catalyst Reduction diesel emissions tests on your truck in Albany, Oregon; and will use computer diagnostic interface to run relevant tests and review pertinent data points for diesel emissions service on your truck in Aloha, Oregon.

Cummins Automotive & Diesel Service will troubleshoot your truck’s diesel emissions service needs by dispatching mobile roadside service to Alsea and Amity, Oregon if you have DEF Diesel Exhaust Fluid failure and inspect your SCR catalyst for possible issues related to the DEF failure, will run DOC Diesel Oxidation Catalyst diesel emissions tests on your truck in Antelope, Oregon and clean the DOC with thermal cleaning; and will use computer diagnostic interface to reference fault logics to enable technicians to diagnose root causes for the precise and accurate repair for diesel emissions service on your truck in Arch Cape and Arlington, Oregon.

Cummins Automotive & Diesel Service will service your truck’s diesel emissions service needs with the dispatch of mobile roadside service to Ashwood, Astoria, and Aumsville, Oregon and inspect the DPF Diesel Particulate Filter to determine if insufficient temperatures have been reached during regeneration which can cause irreversible damage to the DPF, will inspect the SCR catalyst to determine if it is blocked by hardened diesel exhaust fluid on your truck in Aurora, Banks, and Barlow, Oregon; and will use computer diagnostic interface to check the hydrocarbon doser (HD doser) for proper operation because doser failure leads to diesel fuel not being injected into the exhaust stream resulting in the engine failing to regenerate with optimal diesel emissions service function on your truck in Bay City, Beaverton, and Bend, Oregon.

Cummins Automotive & Diesel Service will inspect your truck’s diesel emissions service system by dispatching mobile roadside service to Biggs, Billy Chinook, Blachly, Blue River, Bonneville, Boring, and Brightwood, Oregon to inspect the DPF Diesel Particulate Filter in the exhaust aftertreatment system and remove the DPF to clean the ash out to prevent ash build up inside the DPF that can lead to further problems, will observe data points for shorter intervals between regenerations by datalogging the regen cycles with computer diagnostics interface connected to your truck in Brothers, Brownsville, Bunker Hill, Buxton, Canby, Cannon Beach, Carlton and Cascadia, Oregon; and will use computer diagnostic interface to run SCR Selective Catalyst Reduction Performance and System tests to determine if the SCR is contributing properly to the diesel emissions service function on your truck in Cedar Hills, Chemult, Clackamas, Clatskanie, Concord, Condon, Coos Bay, and Corbett, Oregon.

Cummins Automotive & Diesel Service will check your truck’s diesel emissions service system with the dispatch of mobile roadside service to Cornelius, Corvallis, Cottage Grove, Crabtree, Crawfordsville, Creswell, Culver, and Dallas, Oregon to inspect the EGR Exhaust Gas Recirculation system to determine if it is reducing Nitrogen Oxide NOx by properly recirculating exhaust gases and mixing them into the air passing through the intake where the dilution of the air/fuel mixture lowers combustion temperatures and reduces the formation of NOx, will look at the Check Engine Light on codes to see if the EGR valve is at fault and will thoroughly check other components relative to this diagnostic, investigating to determine if other emissions components, if the coolant system or if lubrication components are at fault in relation to the Check Engine Light on in your truck in Damascus, Dayton, Depoe Bay, Detroit, Dexter, Donald, Drain, Dufur, Dundee, Dunthorpe, and Durham, Oregon; and will use computer diagnostic interface to check if the Variable Geometry Turbochargers VGT is properly reducing particulate matter and NOx emissions in its function with the EGR system by ensuring that positive pressure exists between the exhaust and intake manifold(s) so that sufficient EGR flow is available when it’s needed by the diesel emissions service function on your truck in Eagle Creek, Elkton, Estacada, Eugene, Fairview, Farmington, Florence, Forest Grove and Fossil, Oregon.

Cummins Automotive & Diesel Service will troubleshoot your truck’s diesel emissions service system by dispatching mobile roadside service to Gales Creek, Gardiner, Garibaldi, Gaston, Gates, Gervais, Gilchrist, Gladstone, Glenwood, Glide and Goshen, Oregon to process the Variable Geometry Turbocharger electronic actuator calibration setup to ensure your VGT is properly reducing particulate matter and NOx emissions, will look at the Variable Geometry Turbocharger Hysteresis test, when you find it is packed with soot, to look at the lag time between when the VGT is commanded to a position compared to when it actually reaches that position and measure the range and motor effort to diagnose the competence of the actuator in your truck at Government Pass, in Grand Ronde, Grass Valley, Gresham, Halsey, Happy Valley, Harrisburg, Hebo, Hillsboro, Hood River and Hubbard, Oregon; and will use computer diagnostic interface to run the Aftertreatment Injector Flow test to determine of flow capacity is optimal in relation to the overall performance of the aftertreatment system of the diesel emissions service function on your truck in Independence, Jewell, Junction City, Keizer, Kent, King City, Kings Valley, Lafayette, Lake Oswego, Lakeside, La Pine, Lebanon and Lincoln City, Oregon.

Cummins Automotive & Diesel Service will check your truck’s diesel emissions service system with the dispatch of mobile roadside service to Lorane, Lyons, Madras, Manning, Manzanita, Mapleton, Marcola, Maupin, McKenzie Pass, Mc Kenzie Bridge, McMinnville, Metzger, Mill City and Milwaukie, Oregon to execute the DEF System Heater test to determine if the heater activation signal is within parameters for proper and efficient regeneration cycles, will run the DEF System Leak test to assess the stowage component’s contribution to the DEF system’s efficiency in your truck in Mist, Molalla, Monmouth, Monroe, Moro, Mount Angel, Mt. Bachelor, Mt. Hood, Mt. Hood Meadows, Mt. Hood Skibowl, Mulino, and Multnomah, Oregon; and will use computer diagnostic interface to check the Injector Trim Calibration to determine if the injector trim capacity is optimal in relation to the overall performance of the aftertreatment system of the diesel emissions service function on your truck in Nehalem, Neskowin, Newberg, Newport, North Bend, North Plains, Oak Grove, Oakland, Oakridge, Oregon City, Otis, Pacific City and Philomath, Oregon.

Cummins Automotive & Diesel Service will troubleshoot your truck’s diesel emissions service system by dispatching mobile roadside service to Pleasant Hill, Portland, Powell Butte, Prineville, Rainier, Raleigh Hills, Redmond, Reedsport, Rickreall, Rockaway Beach, Roseburg and Rosemont, Oregon to run the Injection Actuator Pressure test to determine if the injection pressure is adjusted within parameters for proper and efficient fuel delivery across variable pressure levels, will run the Injector Solenoid test to assess proper injector activation for fuel system efficiency relative to the diesel emissions system in your truck at Salem, Sandy, Santa Clara, Santiam Pass, Scappoose, Scio, Scottsburg, Seal Rock, Seaside, Shaniko, Sherwood, Siletz, and Silverton, Oregon; and will use computer diagnostic interface to process the Intake Valve Actuator test to determine if the valve activation occurs at proper temperatures for optimal intake air flow in relation to the overall performance of the aftertreatment system of the diesel emissions service function on your truck in Simnasho, Sisters, Smith Rock, Springfield, St. Helens, St. Paul, Stafford, Stayton, Sublimity, Sunriver, Sutherlin, Sweet Home, and Swiss Home, Oregon.

Cummins Automotive & Diesel Service will assess your truck’s diesel emissions service system by dispatching mobile roadside service to Terrebonne, The Dalles, Tidewater, Tigard, Tillamook, Timberline Ski Resort, Toledo, Troutdale, Tualatin, Tumalo, and Turner, Oregon when you need a new Aftertreatment system installed, we can run the software and connect to the ECM, access the ECM data, install the Aftertreatment system and then reset the Aftertreatment System, will run the Aftertreatment Injector Leak test to assess proper injector fuel delivery efficiency relative to the diesel emissions system in your truck at Tygh Valley, Vernonia, Veneta, Waldport, Walterville, Wapanita Pass, Warm Springs, Warrenton, Wasco, Westfir, and West Linn, Oregon; and will use computer diagnostic interface to process the Aftertreatment Injector Shutoff Valve test to determine if the shutoff occurs within proper parameters for optimal injector operation in relation to the overall performance of the aftertreatment system of the diesel emissions service function on your truck in Westport, West Slope, Wheeler, Wilsonville, Winchester Bay, Willamette Pass, Winston, Woodburn, Yachats, Yamhill, and Yoncalla, Oregon.

Cummins Automotive & Diesel Service will provide complete diesel emissions services for your diesel engine trucks in many cities in Oregon

Heavy duty and medium duty commercial truck, semi truck and pickup truck diesel emissions service in Oregon is a phone call away with Cummins Automotive & Diesel Service whose professional, ASE certified, technician mechanics can provide your diesel emissions service in most cities in the state of Oregon.

2019 Brings Tough Challenges For Portland’s Trucking Industry

The 2019 Oregon State Senate and House of Representatives, both passed a bill to further regulate diesel trucks in the Portland metro area, requiring truck owners to replace their older diesel engines with newer models by the year 2025. The lawmakers’ goal is the reduction of diesel pollution by making newer engines mandatory; technologically advanced engines whose low emissions systems allows them to filter out nearly all toxic diesel particulate matter. The bill requires truck owners to replace their older diesel engines with a 2010 model year engine, or newer. With the onus of the cost of replacement being placed on truck owners, perhaps the bill’s wrinkle of the inclusion of funds coming from the approximate $50 million from the Volkswagen diesel emissions scandal settlement, to help pay for engine upgrades, will help our strapped Portland metro trucking industry make these required engine upgrades with a little less pain.

2022 Assistance For Portland’s Diesel Truck Owners

The Oregon Department of Environmental Quality is providing $8 million in grant funding to reduce diesel emissions in Oregon in 2022. Revenue for this program is provided by the Environmental Mitigation Trust Fund, subject to the settlement agreement between the United States and Volkswagen Group of America, Inc. In 2019, the Oregon Legislature authorized the creation of a grant program supporting businesses, governments and equipment owners in replacing older and more polluting diesel engines with new, cleaner technologies and exhaust control retrofits. These grants are available for qualifying truck owners.

Assistance Resources

• Find out if you are eligible: Diesel Emissions Reduction Grant
• Get answers: Frequently Asked Questions
• See who got the money in 2021: 2021 Recipients
• Guide: DEQ Diesel Mitigation Grants User Guide
• Register: Register to apply for a Diesel Mitigation Grant
• Reimbursement: U.S. Environmental Protection Agency Funding Matrix
• Download Application: Fleet​ Information Spreadsheet
• Retrofit Provider: Authorized Onroad Installers
• Retrofit Provider: Authorized Nonroad Installers

Key Dates For 2022

The below, estimated dates are subject to change.

April 5, 2022: Grant program opens for applications
June 7, 2022: Grant program closes for applications
Aug. 8, 2022: Grant awards announced
Jan. 15, 2023: Funding for projects becomes available

Oregon DEQ & Diesel Truck Emissions

The Oregon Department of Environmental Quality uses a wide variety of tools to help ensure that businesses and individuals comply with state and federal environmental laws. These tools include technical assistance, compliance inspections, investigation of complaints, warning letters, assessment of civil penalties, and compliance orders.

Today’s trucks are manufactured with a Check Engine Light. When the DEQ’s onboard diagnostic test recognizes that this malfunction indicator is commanded on, the truck will fail the diagnostic test. However, as intended, some truck and fleet owners respond to their Check Engine Light by seeking repairs promptly rather than waiting until shortly before the DEQ’s two-year, periodic inspection. 

Prompt action in addressing emissions diagnostic problems prevents excess air pollution. Prompt action, and today’s newer model trucks which are manufactured to operate cleaner, are two reasons why the truck DEQ diagnostic failure rates among VIP programs across the country are so low. The truck manufacturers, the Federal Test Procedure certification emissions test, the DEQ’s onboard diagnostic test, the preventative nature of the Check Engine Light, the trucking industry, and local diesel repair shops, all work together to properly maintain diesel truck fleets to reduce air pollution.

Stop Blowing That Smoke – An Emissions Standards Timeline

1963 – Clean Air Act was passed, introducing Federal Emissions Standards.
1991 – Federal Emissions Standards were introduced to reduce particulate matter.
1994 – Federal Emissions Standards introduced mandating the reduction of particulate matter by 60%.
1998 – Federal Emissions Standards implemented to limit Nitrogen Oxide (NOx) over a gradual time frame with ever stricter limits.
2004 – Federal Emissions Standards introduced to further restrict NOx.
2007 – Federal Emissions Standards introduced to reduce particulate matter to 0.01 g/bhp-hr (96% lower than the 1991 standard) and to enforce a phase-in time period, from 2007 to 2010, requiring further NOx level reductions that were 90% lower than the levels introduced in 2004.
2022 – EPA proposed a rule to set more stringent greenhouse gas (GHG) standards and to significantly reduce emissions of Nitrogen Oxides (NOx), starting in 2027.

Diesel Truck Emissions Technology Development

The timeline above portrays the picture of the continual pressures upon the manufacturers in the trucking industry to find technologies that would meet the demands of the government’s regulations which continued to ratchet down on allowable emissions. To meet the early regulations, engine manufacturers used the technologies of new piston designs, injector spray angle alterations, and electronically controlled injection systems to clear the air.

These technologies created higher injection pressures and eventually the high pressure common rail fuel injection systems were introduced to help reduce particulate matter. Following the common rail technology, Exhaust Gas Recirculation (EGR) systems were implemented to reduce NOx. Then, to fend off demands for further reductions in both NOx and particulate matter, the Diesel Oxidation Catalyst (DOC), the Diesel Particulate Filter (DPF), active regeneration and passive regeneration, the Selective Catalyst Reduction (SCR) system, and the Diesel Exhaust Fluid (DEF) technologies were introduced.

Emissions systems are manufactured with specifications designed to redirect engine exhaust, reduce exhaust noise, and reduce the emissions of hydrocarbons (HC), carbon monoxide (CO), and soluble organic fraction (SOF). Because emissions are thoroughly monitored, with the heavy dependence of the U.S. economy on diesel power to deliver the goods, optimal emissions are central to your success.

Other emissions components are covered in more detail, below, but oxygen sensors, PCV breathers, valves & hoses, carbon vapor canisters, purge valves, smog pumps, air injection pumps, valves & hoses, and Eco CARB EPA compliant direct fit catalytic converters are important components in diesel truck emissions systems. Their proper function is crucial to the efficacy of emissions reductions. Cummins Automotive & Diesel Service can check these components for you and make sure, if it would prove beneficial to your system, that you are set up with AFR sensors and Lambda Controls.

Diesel Truck Exhaust Emissions Acronyms

Emissions & The Diesel Exhaust Aftertreatment System

Do you need maintenance, repair or replacement of the DOC, DPF or SCR in your diesel truck’s exhaust aftertreatment system?

The aftertreatment system is the workhorse for reducing harmful diesel exhaust emissions and cleaning exhaust gases from the truck’s exhaust with an assortment of filters, catalysts, sensors and devices to ensure the engines meet emission regulations. Harmful emission gases in the exhaust stream move from the exhaust side of the turbo through the exhaust piping and pass on, downstream, through the filters and catalysts in the aftertreatment system.

Diesel engine emissions contain particulate matter, resulting from unburned fuel. Diesel particulate matter is a composition of very small particles that are composed of solid elemental carbon cores which have organic carbon compounds adhering to the surfaces. The organic carbon includes polyaromatic hydrocarbons. Sulphates and heavy metals are also said to be in diesel particulate matter. Today, particulate matter is nearly completely removed by the exhaust aftertreatment system and are reduced to the eco-friendly elements of water and oxygen. It is important to keep a truck’s emissions running at optimal performance. Without regular and timely maintenance of the system, poor performance, poor fuel efficiency or even component failure can result.

EGR System

Exhaust Gas Recirculation (EGR) valves are a key component in the diesel truck’s emissions reduction system. Nitrogen oxide (NOx) gases are formed in the combustion chamber when heat brings nitrogen and oxygen atoms together. NOx is an ozone which settles at ground level, causing breathing problems, acid rain and smog. The EGR system reduces NOx as it recirculates exhaust gases and mixes them into the air passing through the intake where the dilution of the air/fuel mixture lowers combustion temperatures and reduces the formation of NOx.

The amount of exhaust gases entering the intake is controlled by the EGR valve. With exhaust gas temperatures exceeding 1,200 degrees Fahrenheit, these gases are too hot to introduce directly into the intake, so they pass through an EGR cooler on the way to the intake. These coolers pass the exhaust through a piping chamber connected to the engine’s cooling system. The EGR cooler, an air-to-liquid heat exchanger, uses the circulating engine coolant to lower the temperature of the exhaust gases passing through it. The cold-side EGR valve directs exhaust gases into the intake after they’ve left the EGR coolers.

EGR valves are a point of failure with diesel engines. When the valve sticks, it triggers the Check Engine Light and it decreases power. Replacing only the EGR valve, often times, isn’t all that is needed to protect your engine, because EGR failure is usually caused by problems with other emissions, coolant or lubrication components. If your Check Engine Light is on, Cummins Automotive & Diesel Service can check to see if the EGR valve is at fault and will thoroughly check other components relative to this diagnostic, investigating to determine if other emissions components, the coolant system or lubrication components are at fault.

Variable Geometry Turbocharger (VGT)

Variable Geometry Turbochargers are a crucial component in the reduction of both particulate matter and NOx emissions. In relation to the EGR system, the VGT ensures that positive pressure exists between the exhaust and intake manifold(s) so that sufficient EGR flow is available when it’s needed. Additionally, by functioning like a more restrictive turbo at lower RPMs, its transient response translates into peak efficiency. This responsiveness means that the engine is kept within its power band, where fuel is more efficiently burned.

The VGT turbocharger also plays an important role in engine function. Any loss of turbine efficiency can lead to diesel engine performance problems with incremental maleffects on emissions reduction. Diagnostics aimed at Variable Geometry Turbocharger fault detection in the estimation of the turbine efficiency via sensitivity analysis provides an evaluation of the impact of relevant sensors in the engine intake exhaust equation, providing pertinent data to the technician relative to the turbocharger’s efficiency status in its relation to current engine performance.

DOC, DPF, Regeneration, Back Pressure & SCR

Heavy duty diesel pickup trucks and semi trucks use an assortment of exhaust aftertreatment devices, including Diesel Oxidation Catalysts (DOC), Diesel Particulate Filters (DPF) and Selective Catalytic Reduction (SCR) catalysts. The combination of these three devices utilize physical mechanisms and chemical reactions to remove nearly all particulates and harmful gases.

The DOC is a honeycomb ceramic catalyst and it is the first device in the aftertreatment system that the flow of exhaust encounters after it leaves the engine’s manifold. The DOC is a flow through filter that contains precious metals. The gases in the exhaust, upon flowing through the DOC, start the oxidation of hydrocarbons, carbon monoxide, unburned fuel, and oil; it oxidizes NO (Nitric Oxide) to NO₂ (Nitrogen Dioxide), and some particulate matter (PM) is removed.

The DPF is the second device in the aftertreatment system and it is a honeycomb ceramic filter, but unlike the DOC’s flow through design, the DPF is a wall-flow filter that traps any soot that remains in the exhaust which the DOC could not oxidize. The soot will remain in the DPF until it is regenerated. With regeneration, the remaining particulates will be oxidized through two different engine temperature elevation processes.

Passive regeneration and active regeneration are the two processes that capably oxidize the particulate matter, or soot. Passive regeneration occurs when the truck’s normal operating temperatures reach between 527⁰ and 680⁰ Fahrenheit. As the DOC oxidizes the unburned diesel fuel in the exhaust it provides the means of increasing the DPF temperature to heat extensive enough to incinerate the soot buildup within the DPF and reduce it to ash. Active regeneration is executed when sensors detect an excessive build-up of particulates within the DPF, at which point, raw fuel is injected into the exhaust stream. The excess fuel triggers engine operating temperatures in excess of 1,112⁰ Fahrenheit.

Regeneration is an important process, because without it soot builds up and the exhaust back pressure can elevate. Regeneration converts the soot to an ash and this usually reduces the backpressure down, close to normal, or at normal. The ash is composed of the minerals, metals and trace elements that result from the oxidized gases and from the breakdown of lubricants and additives. The ash is an element in the exhaust aftertreatment system that will need to be dealt with manually. It is important to periodically remove the DPF to clean the ash out. If it is not cleaned out, it will build up inside the DPF and eventually lead to problems.

Ash builds up at a much slower rate than soot; however, if the buildup is ignored it will eventually cause increased back pressure, excessive fuel consumption and potential DPF failure. The longer the ash is left inside the DPF the greater the chance it has of hardening into a plug which can block a portion of the filter. Additionally, as ash builds inside the DPF the frequency of active regenerations increases, causing poor fuel economy, extremely high temperatures, and can possibly lead to constant elevations in back pressure that can be harmful to the turbo charger.

If you notice your diesel truck is exhibiting shorter intervals between regenerations, it can be a first clue to ash build up and the need to remove the DPF for cleaning. Cummins Automotive & Diesel Service can observe the shorter intervals between regenerations by datalogging the regen cycles in the workshop with diagnostic equipment. If you bring your diesel truck in to Cummins Automotive & Diesel Service, when they remove the DPF for cleaning, they will also remove the DOC and clean it, if necessary.

The SCR catalyst is the third, and last, component in the aftertreatment system. It is a flow through device which introduces Diesel Exhaust Fluid (DEF) into the process by injecting a light mist of urea into the hot exhaust stream. The diesel exhaust fluid contributes to the further break down of the nitrogen oxides (NOx) that were able to get past the DOC and the DPF, chemically converting them into harmless nitrogen. The SCR catalyst usually does not need maintenance, but Cummins Automotive & Diesel Service will inspect it for those rare occasions in which the component related to the DEF fluid fails.

The DOC, the DPF, and the SCR catalyst all contain ultra-fine filter materials with which they capture the microscopic particulates. A DOC can contain several precious metals, on of which is platinum, which bonds with the oxygen molecules in hydrocarbons. The DPF can contain different materials, but most commonly it will contain cordierite composites. An SCR catalyst contains filter contents in the form of ceramic materials and precious metals. The array of filter materials contained in each device provide a specific composition of metals which play important roles in the chemical reactions necessary to effectively clean the particulates for the reduction of emissions.

DOC, DPF & SCR Maintenance

With time, the DOC, the DPF and the SCR catalyst can become clogged, therefore regular maintenance is important. Cummins Automotive & Diesel Service can quickly locate each device and service them accordingly. Routine maintenance cannot be emphasized enough, because if substantial blockage builds up, it can cause irreparable damage to the exhaust system that can result in excessively high repair costs, unscheduled truck down time, and the release of particulate matter pollution into the environment.

The DOC and DPF can be cleaned using pneumatic and thermal cleaning processes. The SCR catalyst, however, because it is a closed unit, it is not suitable for pneumatic cleaning. The SCR catalyst can get blocked by hardened diesel exhaust fluid. If this occurs, it is usually not serviceable, requiring replacement of the SCR catalyst.

Driving Patterns

These filters and catalysts are sensitive devices and they work in delicate balance with each other. They are synced with the engine’s operation and respond to how the trucks are driven. If driving patterns are short and infrequent, the high temperatures necessary for regeneration may not be reached and irreversible damage to the DPF can occur. Trucks that are on the road a majority of their operation time will naturally encounter driving patterns whereby the passive regeneration kicks in regularly, resulting in the expected, longer service duration before maintenance is necessary.

Preventative Maintenance Helps To Ensure Complete Regeneration

Diesel exhaust aftertreatment systems are highly sophisticated emissions systems that need to be properly diagnosed and repaired when the regeneration process fails. Looking for the clues and indicators that regeneration has failed, or that it has processed incompletely, can save truck operators money. Early maintenance and repairs are usually less expensive than replacing the DOC or the DPF when they become compromised beyond servicing.

Cummins Automotive & Diesel Service can check the hydrocarbon doser (HD doser) for proper operation. If the HD doser fails, diesel fuel will not be injected into the exhaust stream and the engine will fail to regenerate.

Cummins Automotive & Diesel Service can check if the DPF pressure sensors are malfunctioning, which will cause the aftertreatment control module or the Engine Control Unit (ECU) to receive false readings and possibly initiate regenerations more frequently than are normal.

Cummins Automotive & Diesel Service can check for any fault codes related to the Exhaust Gas Recirculation (EGR) system. This is an important diagnostic metric to monitor because EGR fault codes can either interfere with the regeneration process or they can cancel a regeneration entirely.

If your truck is operated under conditions consisting primarily of short trips or stop and go traffic, face plugging of the DOC can occur. A plugged DOC is a DOC failure and it will interfere with the regeneration process. Cummins Automotive & Diesel Service can check the condition of your DOC. When a diesel engine is allowed to regularly reach the correct operating temperature, with longer driving/operating durations, DOC face plugging does not occur.

Cummins Automotive & Diesel Service can remove your DPF for the routine service of baking and blowing, or aqueous cleaning, to restore the filter to approximately 95% of its capacity. This routine DPF service will prevent the diesel particulate filter from plugging. A clean DPF is important because clean filters can ensure efficient, thorough regenerations rather than regenerations that last longer with poor results.

Cummins Automotive & Diesel Service can check for faulty temperature sensors. Temperature sensor readings give indications of how the DPF system is operating. Temperature sensor diagnostics are an important part of routine maintenance service because faulty sensors will stop the regeneration process.

Cummins Automotive & Diesel Service can check for early signs of Variable Geometry Turbo failures. Variable Geometry Turbo failures can prevent regenerations from being completed due to a less than optimal heat generation during the regeneration process.

Cummins Automotive & Diesel Service can run complete engine fault codes diagnostics. Engine fault codes can be thrown to indicate the failure of one or more components in the truck’s complete operating system. If one or more components in the system are faulty, they can prevent the regeneration process from occurring. As with faulty temperature sensors, engine fault codes related to emissions, pressures, turbos, boost, and more, can point out components that may need to be tested for proper operation to ensure regenerations are able to be processed.

Cummins Automotive & Diesel Service can run diagnostics on the network of electrical wires, connectors and plugs that run from components to their respective sensors. Faulty electrical wires, connectors and plugs can prevent regenerations just as faulty sensors or components can. When the electrical connecting network contains faults, the sensors may not be malfunctioning but the ECM or other related computers will receive incorrect values due to the wiring harness being defective. Incorrect values received by the ECM or other related computers can prevent full regenerations or initiate incomplete regenerations.