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Service bulletin S2321000007

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10243164
Published by NHTSA2023-10-02
Manufacturer's numberS2321000007
Manufacturer's date2023-08-17
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN

NHTSA's summary

Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P0944 ? Loss of Hydraulic Pump Prime, and P0868 ? Transmission Fluid Pressure Low, Set.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline, Automatic transmission, Transmission control module

Trouble codes named

P0868, P0944

Vehicles listed
RAM 25002022, 2023
RAM 35002022, 2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V2880002026-05-07. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
24V4130002024-06-06. POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION
22V8350002022-11-10. POWER TRAIN:AUTOMATIC TRANSMISSION

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
18082232023-09-25. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customers may experience the following: ? Cruise control inoperative. This bulletin involves reprogramming the PCM with the latest available software.
18074232023-08-21. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customers may experience one or more of the following: ? Longer crank time than normal. ? Transmission overheat conditions with a message displayed in cluster stating "Transmission oil temperature is too hot". This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software.
18018232023-04-17. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customer or technician may experience the following: ? **Power Take Off (PTO) disable to high engine oil temperature (DD and DP Cab Chassis only)**. ? Customer may complain of slow PTO idle ramp up. ? Message will appear ?Hot Oil? and exit high idle or PTO mode, when in high idle or PTO mode and running between 10-30 minutes (no load). ? High frequency exhaust noise at idle after cold start. This bulletin involves reprogramming the PCM with the latest available software.
21030222023-01-23. Service bulletin. Transmission Control Module (TCM) Updates
1803522REVA2022-12-12. Service bulletin. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience one or more of the following: Customer may complain of slow PTO idle ramp up. Message will appear "Hot Oil" and exit high idle or PTO mode, when in high idle or PTO mode and running between 10-30 minutes (no load). High frequency exhaust noise at idle after cold start.
1809422REVB2022-12-12. Service bulletin. 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.
18-094-222022-06-27. Service bulletin. 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