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Service bulletins for the 2022 Ram 2500

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.

541 on file from NHTSA, as of 2026-10-19.

About P0401 on the 2022 Ram 2500: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P0401 are shown. Show all

Bulletins, newest first
18-005-232023-02-13. Service bulletin. FUEL SYSTEM, GASOLINE; ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); FUEL SYSTEM, DIESEL; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Flash: Powertrain Control Module (PCM) Updates 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: **P0299 - Turbocharger Underboost.** P026B-00 - Injection Timing Performance. P061B-00 - Internal Control Module Torque Calculation Performance. P1451-00 - Diesel Particulate Filter System Performance. P0755-00 - Shift Solenoid ?B? (DG7 Trans Sales Code). P0765-00 - Shift Solenoid ?D?(DG7 Only). P0401-00 - EGR System Performance Customers may also experience the following: **Service Exhaust System message in the Electronic Vehicle Information Center (EVIC) with no MIL.** Improvements to cold temperature engine rpm fluctuation. Reduce audible engine flare during upshifts (DG7 Only). Improvements to help prevent OD clutch premature wear (DG7 Only). 1-2-1 gear hunting on grades while operating under high loads in areas of low traction (e.g. rain, snow, ice or dirt) (DG7 Only). wiTECH Fuel System Run-Up Test routine Improvement. Idle stability Improvement. wiTECH PCM data improvements. wiTECH cylinder cut-out routine, improvement. This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software.
1809422REVB2022-12-12. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (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 more of the following DTCs have been set: P0299-00 - Turbocharger Underboost. P026B-00 - Injection Timing Performance. P061B-00 - Internal Control Module Torque Calculation Performance. P1451-00 - Diesel Particulate Filter System Performance. P0755-00 - Shift Solenoid "B"(DG7 Trans Sales Code). P0765-00 - Shift Solenoid "D"(DG7 Only). P0401-00 - EGR System Performance. The following improvements are also included in this update:Improvements to cold temperature engine rpm fluctuation. Reduce audible engine flare during upshifts(DG7 Only). Improvements to help prevent OD clutch premature wear (DG7 Only). 1-2-1 gear hunting on grades while operating under high loads in areas of low traction (e.g. rain, snow, ice or dirt)(DG7 Only) wiTECH Fuel System Run-Up Test routine Improvement. Idle stability Improvement. wiTECH PCM data improvements. wiTECH cylinder cut-out routine, improvement.
1809422REVA2022-11-07. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (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 more of the following DTCs have been set: P0401-00 - EGR System Performance. P0299-00 - Turbocharger Underboost (ETM Only). The following improvements are also included in this update: wiTECH Fuel System Run-Up Test routine Improvement. Idle stability Improvement. wiTECH PCM data improvements. wiTECH cylinder cut-out routine, improvement
18-094-222022-06-27. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (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 more of the following Diagnostic Trouble Codes (DTCs) have been set: P0401-00 - EGR System Performance. P0299-00 - Turbocharger Underboost (ETM Only). P0755-00 - 2C Solenoid Circuit. P0765-00 - UD Solenoid Circuit. The following improvements are also included in this update: wiTECH PCM data improvements. wiTECH cylinder cut-out routine, improvement

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.