# Service bulletin D1902

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10223562
- Published by NHTSA: 2022\-10\-17
- Manufacturer's number: D1902
- Manufacturer's date: 2020\-06\-03
- NHTSA component: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\)

## NHTSA's summary

Fast Feedback Program \- 6.7L Cummins Engine \- 2019 \& 2020 HD Ram \& 6.7L Cummins Diesel Engine Control Module \(ECM\) \- 2018 Ram\- All Models \(Rev. E\)

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10223562-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10223562-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Engine control module

## Vehicles listed

- 2018 to 2020 RAM 1500
- 2018 to 2020 RAM 2500
- 2018 to 2020 RAM 3500
- 2018 to 2020 RAM 4500
- 2018 to 2020 RAM 5500
- 2018 to 2020 RAM PROMASTER
- 2018 to 2020 RAM PROMASTER CITY

## Other bulletins for the same vehicles and component

- [S2008000186REVA](/bulletins/10229492.md), 2023-01-09, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM. Engine Control Module \(ECM\) Flash Failure, Diagnostic Trouble Code \(DTC\) U1601 ? ECU Application Software Code 1 Missing Or Corrupted
- [S2208000073](/bulletins/10229059.md), 2023-01-09, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). No Start, After Flash And Or PCM Replace, DTC P0513 Invalid Skim Key Setting
- [1808022](/bulletins/10228035.md), 2022-12-19, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\); BACK OVER PREVENTION; POWER TRAIN; FUEL SYSTEM, GASOLINE; SERVICE BRAKES, HYDRAULIC; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; EXTERIOR LIGHTING. Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain ControlModule \(ECM/PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or moreof the following DTCs have been set: P064F \- Unauthorized Software/Calibration Detected. P2706 \- MS Solenoid Circuit\(68RFE Only\). P0868 \- Line Pressure Low. P229F \- Aftertreatment NOxSensor Circuit Performance \- Bank 1 Sensor 2. P207F \- Reductant Quality Performance. P2509 \- PCM/PCM Power Input Signal Intermittent. P0401 \- EGR System Performance. P0870 \- OD Hydraulic Pressure Test. P040B \- Exhaust Gas Recirculation Temperature Sensor "A" Circuit Performance. P2201 \- Aftertreatment NOx Sensor Circuit Performance \- Bank 1 Sensor 1. P1C54 \- SCR NOx Catalyst Missing. P249E \- Closed Loop SCR Reductant Injection Control At Limit \- Flow Too High. P0128 \- Thermostat Rationality. P24C7 \- Particulate Matter Sensor Temperature Circuit Performance. Customers may also comment on the following: Engine misfire in cold ambient temperatures. In addition, the following software enhancements are also available: Scan tool fan actuation test fix. Enabling diagnostics forDTC P208B\- Reductant Pump 1 Control Performance. Unable to turn on the ability to set ?MAX? road speed using wiTECH scan tool. Mass Air Flow \(MAF\) sensor Out Of Range \(OOR\) low calibration. Improved 5\-4 shift \(reduce shift flare\) after extended operation in 5th or 6th gear. Engine Manifold Pressure Misfire Monitor \(EMP MFM\) retune\(68RFE Only\). Idle based misfire retune. Abort timer for Selective Catalytic Reduction \(SCR\) out NOx sensor missingchange to 70 seconds. Map SCR missingFault/DTC P1C54to tampering inducement. Particulate Matter \(PM\) sensor false fault improvement. CC inner loop used up faults. Ultrasonic Flow Meter \(UFM\) test results fix. Engine run state idle unstable software fix.
- [1810222REVA](/bulletins/10225267.md), 2022-10-31, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; FUEL SYSTEM, GASOLINE; BACK OVER PREVENTION; POWER TRAIN; SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, DIESEL. Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain ControlModule \(ECM/PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or moreof the following \(DTCs\) have been set: P0506 \- Idle Control System RPM Lower Than Expected. P0299\-00 \- Turbocharger Underboost. P20EE\-00 \- NOx Catalyst Efficiency Below Threshold. P242F\-00 \- Diesel Particulate Filter Restriction \- Ash Accumulation. P1451\-00 \- Diesel Particulate Filter System Performance. P2463\-00 \- Diesel Particulate Filter Restriction \- Soot Accumulation Bank 1. P026B \- Injection Timing Performance. P0607\-00 \- ECU Internal Performance. P20E8\-00 \- Reductant Pressure Too Low. P0301\-00 \- Cylinder 1 Misfire. P0302\-00 \- Cylinder 2 Misfire. P0303\-00 \- Cylinder 3 Misfire. P0304\-00 \- Cylinder 4 Misfire. P0305\-00 \- Cylinder 5 Misfire. P0306\-00 \- Cylinder 6 Misfire. P1C54\-00 \- SCR NOx Catalyst Missing. P2706\-00 \- MS Solenoid Circuit \(68RFE Only\). P1D73\-00 \- AGS Performance. P24A5\-00 \- EGR Cooler Bypass Bank 1 Control Stuck\(Sales Code ETM\). P0420\-00 \- Catalyst System Efficiency Below Threshold Bank 1\(Sales Code ETM\). P2002\-00 \- Diesel Particulate Filter Efficiency Below Threshold\(Sales Code ETM\). P0191\-00 \- Fuel Rail Pressure Sensor Circuit Performance\(Sales Code ETM\). P0461\-00 \- Fuel Level Sensor 1 Performance\(Sales Code ETM\). P0401\-00 \- EGR System Performance\(Sales Code ETM\). P208B\-00 \- Reductant Pump 1 Control Performance\(Sales Code ETM\). The customer may also notice one or more of the following: Idle Instability. Harsh downshift clunk during exhaust brake deceleration. Diesel Exhaust Fluid \(DEF\) gauge erratic when DEF level is low. Stall when putting in reverse in cold ambient temps. Engine stumble during engine warm up. Unstable idle when AC compressor cycles. Engine surge felt while driving\(Sales Code ETM\). Idle fluctuation.
- [1810122REVA](/bulletins/10225265.md), 2022-10-31, Service bulletin: BACK OVER PREVENTION; FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ELECTRONIC STABILITY CONTROL:AUTOMATIC \(ASC\); FUEL SYSTEM, GASOLINE; EXTERIOR LIGHTING; SERVICE BRAKES, HYDRAULIC. Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Engine Control Module \(ECM\) / PowertrainControl Module \(PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or moreof the following DTCs have been set: P0506 \- Idle Control System RPM \- Lower Than Expected. P0299\-00 \- Turbocharger Underboost. P20EE \- NOx Catalyst Efficiency Below Threshold. P1451\-00 \- Diesel Particulate Filter System Performance. P242F\-00 \- Diesel Particulate Filter Restriction \- Ash Accumulation. P2463\-00 \- Diesel Particulate Filter Restriction \- Soot Accumulation Bank 1. P026B \- Injection Timing Performance. P0607\-00 \- ECU Internal Performance. P20E8\-00 \- Reductant Pressure Too Low. P0301\-00 \- Cylinder 1 Misfire. P0302\-00 \- Cylinder 2 Misfire. P0303\-00 \- Cylinder 3 Misfire. P0304\-00 \- Cylinder 4 Misfire. P0305\-00 \- Cylinder 5 Misfire. P0306\-00 \- Cylinder 6 Misfire. P1C54\-00 \- SCR NOx Catalyst Missing. P2706\-00 \- MS Solenoid Circuit \(68RFE Only\). P1D73\-00 \- AGS Performance. P0421\-00 \- Catalyst 1 Efficiency Below Threshold Bank 1. P24A5\-00 \- EGR Cooler Bypass Bank 1 Control Stuck. P21C4\-00 \- Reductant Line Heater Relay Control Circuit High. P2560\-00 \- Engine Coolant Level Low. P2201\-00 \- Aftertreatment NOX Sensor Circuit Performance \- Bank 1 Sensor 1. P0604\-00 \- Internal Control Module Ram. P0607\-00 \- ECU Internal Performance. P0868\-00 \- Line Pressure Low \(Module, Powertrain Control \(PCM\),\(68RFE Only\). P0740\-00 \- TCC Out Of Range. P218F\-00 \- Reductant No Flow Detected. P226C \- Turbocharger Boost Control ?A? Slow Response \(In extreme cold ambienttemperatures\). P061A \- Level 2 Torque Performance. P061B \- Internal Control Module Torque Calculation Performance. P061E \- Internal Control Module Brake Signal Performance. P062C \- Etc Level 2 Mph Performance. P203F \- \(Diesel Exhaust Fluid\) Reductant Level Too Low. P0420 \- Catalyst System Efficien
- [S1925000008RevA](/bulletins/10221819.md), 2022-09-26, Service bulletin: SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, GASOLINE; EXTERIOR LIGHTING; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). \(Revision A\) Malfunction Indicator Lamp \(MIL\) Illumination. Diagnostic Trouble Codes \(DTCs\) P20E8 ? Reductant Pressure Too Low and/or P208B ? Reductant Pump 1 Control Performance Set.
- [18\-015\-21](/bulletins/10218563.md), 2022-08-22, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; BACK OVER PREVENTION; FUEL SYSTEM, DIESEL; SERVICE BRAKES, HYDRAULIC; FUEL SYSTEM, GASOLINE; EXTERIOR LIGHTING; ELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE. Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the Engine Control Module \(ECM\) / Powertrain Control Module \(PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: P0607\-00 \- ECU Internal Performance. P20E8\-00 \- Reductant Pressure Too Low. P0301\-00 \- Cylinder 1 Misfire\(Sym Cam Pump Only\). P0302\-00 \- Cylinder 2 Misfire\(Sym Cam Pump Only\). P0303\-00 \- Cylinder 3 Misfire\(Sym Cam Pump Only\). P0304\-00 \- Cylinder 4 Misfire\(Sym Cam Pump Only\). P0305\-00 \- Cylinder 5 Misfire\(Sym Cam Pump Only\). P0306\-00 \- Cylinder 6 Misfire\(Sym Cam Pump Only\). P1C54\-00 \- SCR NOx Catalyst Missing. P242F\-00 \- Diesel Particulate Filter Restriction \- Ash Accumulation\(68RFE Only\). P2463\-00 \- Diesel Particulate Filter Restriction \- Soot Accumulation Bank 1\(68RFE Only\). P1451\-00 \- Diesel Particulate Filter System Performance\(68RFE Only\). P0299\-00 \- Turbocharger Underboost. P2706\-00 \- MS Solenoid Circuit \(68RFE Only\). P1D73\-00 \- AGS Performance. P061B \- Internal Control Module Torque Calculation Performance. P064B\-00 \- PTO Control Module. The customer may also notice the following: Harsh downshift clunk during exhaust brake deceleration. DEF gauge erratic when DEF level is low. Stall when putting in reverse in cold ambient temps. Engine stumble during engine warm up. Unstable idle when AC compressor cycles. Power Take Off \(PTO\) intermittently turns off with no DTCs. In addition the following software enhancements are included: Engine oil pressure switch modification. Oil Change Monitor Improvements For Severe Duty Operation. System Improvement for PTO operation. wiTECH Mass Air Flow \(MAF\) data parameter improvement. Enabling wiTECH Particulate Matter \(PM\) Sensor Regeneration Test in PCM ?Misc Functions?. Active Grille Shutter \(AGS\) quality enhancements.
- [1801221](/bulletins/10212520.md), 2022-05-31, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\). Flash: Powertrain Control Module \(PCM\) Updates OVERVIEW:
- [S2008000186](/bulletins/10184726.md), 2020-12-28, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; ELECTRICAL SYSTEM. Engine Control Module \(ECM\) Flash Failure, Diagnostic Trouble Code \(DTC\) U1601 ? ECU Application Software Code 1 Missing Or Corrupted

JSON: [/v1/bulletins/10223562](/v1/bulletins/10223562)

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