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Service bulletins for the 2025 Ram 1500

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
21-009-25 REV. C2025-07-09. Service bulletin. POWER TRAIN. 850RE D Clutch Repair Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must have at least 11,265 km (7,000 mi.) and exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0733-00 - Gear 3 Shift Incorrect Ratio. ● P1DA8-00 - Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92-00 - Incorrect Gear Ratio - Clutch 4 Defective. Customers may also comment on one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear This bulletin involves replacing the D clutch.
21-011-25 REV. A2025-07-02. Service bulletin. POWER TRAIN. Flash: Transmission Control Module (TCM) Updates The customer must describe one or more of the following: ● **No perceptible change when drive mode is selected. ● Harsh or unstable launches in slippery or off-road conditions. ● Drive mode operating in incorrect drivetrain configurations.** ● Bump or jerk felt during Engine Start/Stop (ESS) operation in normal and snow modes. ● Bump during tip-in downshift while in Normal or Sport modes. ● Transmission shifting concerns when vehicle has less than 1500 miles (2414 Km). ● Driveability concerns and not holding correct gear during downgrade, snow mode and accelerator tip-out maneuvers This bulletin involves reprogramming the TCM with the latest available software.
18-031-252025-06-18. Service bulletin. POWER TRAIN. "Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P00C6-00 - Fuel Rail Pressure Too Low - Engine Cranking.** ● P0325 - Knock/Combustion Vibration Sensor 1 Circuit. ● P0330 - Knock/Combustion Vibration Sensor 2 Circuit. ● P032A - Knock-Combustion Vibration Sensor C Circuit. ● P018B - Fuel Pressure Sensor ""B"" Circuit Range/performance. ● P2AF6 - Starter Relay 3 Stuck Off. ● P1CEA - Boost Side EVAP Purge System Performance. ● U0104 - Lost Communication With Cruise Control Module and U0405 - Invalid Data Received From Cruise Control Module may also be set. This software flash will allow these permanent fault codes to naturally clear. NOTE: If the software update is not completed, customers may have issues with registering vehicle in states with inspections due to the MIL being on (Only an issue if U0104/U0405 have set in life of vehicle). Customers may experience the following: ● **A potential to stall when coming to a stop with an immediate restart. If the engine were to stall while stopping, a message would display in the cluster informing the driver to shift to park to restart the engine.** Other software improvements: ● Improvements related to fault codes P0300, P0301, P0302, P0303, P0304, P0305 and P0306 for cold start catalyst heating misfire.. This bulletin involves reprogramming the PCM and Ignition System Control Module (ISCM) and the with the latest available software"
03-005-252025-06-10. Service bulletin. POWER TRAIN. "4WD Inoperative Or Noisy Customers may experience one or more of the following: ● Noise while in 4WD. ● 4WD inoperative. This bulletin involves inspecting and possibly replacing the output shafts."
91005762025-05-29. Service bulletin. POWER TRAIN. Transfer Case Motor Gear: Confirm the attachment points from the wiring routes when they inspect a shift motor on the t-case. Review the connection of the connector X238A, make sure it's fully seated and that the lever is fully locked on the connector.
21-016-25 REV. A2025-05-20. Service bulletin. POWER TRAIN. "Valve Body Replacement Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U0101 - Lost Communication With The Transmission Control Module (TCM). ● U0402 - Implausible Data Received From TCM. ● U0418 - Implausible Data Received From Brake System Control Module 1. Customers may also comment on the following: ● Vehicle will go in limp-in mode. After the vehicle enters limp-in mode and has been shifted into Park, the vehicle will not shift into a forward or reverse gear This bulletin involves replacing the transmission valve body assembly."
91005702025-05-19. Service bulletin. POWER TRAIN. "Transmission Fluid Please note fluid color/condition/odor is NOT an indicator of transmission health and should not be used as the reason for unit replacement. Visible ""glitter"" or debris in the pan does not justify complete unit replacements."
S25180000042025-05-06. Service bulletin. POWER TRAIN. Mil-On/Check Engine Lamp-On
21-009-25 REV. B2025-04-08. Service bulletin. POWER TRAIN. "850RE D Clutch Repair **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must have at least 11,265 km (7,000 mi.) and exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):** ● P0733-00 - Gear 3 Shift Incorrect Ratio. ● P1DA8-00 - Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92-00 - Incorrect Gear Ratio - Clutch 4 Defective. Customers may also comment on one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear This bulletin involves replacing the D clutch."
1036202025-03-19. Service bulletin. POWER TRAIN. SHAFT - AXLE HALF
1029352025-03-04. Service bulletin. POWER TRAIN. VALVE BODY & CONTROL UNIT - TRANSMISSION
21-015-252025-02-11. Service bulletin. POWER TRAIN. "Flash: Transmission Control Module (TCM) Updates The customer must describe one or more of the following: ● Bump or jerk felt during Engine Start/Stop (ESS) operation in normal and snow modes. ● Bump during tip-in downshift while in Normal or Sport modes. ● Transmission shifting concerns when vehicle has less than 1500 miles (2414 Km). ● Driveability concerns and not holding correct gear during downgrade, snow mode and accelerator tip-out maneuvers. This bulletin involves reprogramming the BPCM, MCP A, MCP B and the EVCU with the latest available software and then, if needed, performing a Wheel End Disconnect Position Learn routine"
21-009-25 REV.A2025-02-04. Service bulletin. POWER TRAIN. "D Clutch Repair Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0733-00 - Gear 3 Shift Incorrect Ratio. ● P1DA8-00 - Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92-00 - Incorrect Gear Ratio - Clutch 4 Defective. Customers may also comment on one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear. This bulletin involves replacing the D clutch"
21-011-252025-01-28. Service bulletin. POWER TRAIN. "Flash: Transmission Control Module (TCM) Updates The customer must describe one or more of the following: ● Bump or jerk felt during Engine Start/Stop (ESS) operation in normal and snow modes. ● Bump during tip-in downshift while in Normal or Sport modes. ● Transmission shifting concerns when vehicle has less than 1500 miles (2414 Km). ● Driveability concerns and not holding correct gear during downgrade, snow mode and accelerator tip-out maneuvers This bulletin involves reprogramming the TCM with the latest available software. "
21-009-252025-01-22. Service bulletin. POWER TRAIN. D Clutch Repair Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0733-00 - Gear 3 Shift Incorrect Ratio. ● P1DA8-00 - Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92-00 - Incorrect Gear Ratio - Clutch 4 Defective. **Customers may also comment on one or more of the following: ● Transmission slips when shifting. ● Vehicle will not move in reverse. ● Vehicle will not shift higher than third gear.** This bulletin involves replacing the D clutch."
21-039-24 REV. H2024-12-18. Service bulletin. POWER TRAIN. "D Clutch Repair Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0733-00 - Gear 3 Shift Incorrect Ratio. ● P1DA8-00 - Incorrect Gear Ratio Clutch A B or D Defective. ● P1D92-00 - Incorrect Gear Ratio - Clutch 4 Defective. This bulletin involves replacing the D clutch"
S24230000482024-11-13. Service bulletin. STEERING; ELECTRICAL SYSTEM; POWER TRAIN. Power Steering Assist With Transfer Case In Neutral.
18-071-24 REV. B2024-11-07. Service bulletin. POWER TRAIN. "Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0325 - Knock/Combustion Vibration Sensor 1 Circuit. ● P0330 - Knock/Combustion Vibration Sensor 2 Circuit. ● P032A - Knock-Combustion Vibration Sensor C Circuit.** ● P018B - Fuel Pressure Sensor ""B"" Circuit Range/performance. ● P2AF6 - Starter Relay 3 Stuck Off. ● P1CEA - Boost Side EVAP Purge System Performance. ● U0104 - Lost Communication With Cruise Control Module and U0405 - Invalid Data Received From Cruise Control Module may also be set. This software flash will allow these permanent fault codes to naturally clear. NOTE: If the software update is not completed, customers may have issues with registering vehicle in states with inspections due to the MIL being on (Only an issue if U0104/U0405 have set in life of vehicle). Other software improvements: ● Improvements related to fault codes P0300, P0301, P0302, P0303, P0304, P0305 and P0306 for cold start catalyst heating misfire. This bulletin involves reprogramming the PCM and Ignition System Control Module (ISCM) and the with the latest available software"
1006352024-11-01. Service bulletin. POWER TRAIN. VALVE BODY & CONTROL UNIT - TRANSMISSION
18-071-24 REV. A2024-10-14. Service bulletin. ENGINE; POWER TRAIN. "Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P018B - Fuel Pressure Sensor ""B"" Circuit Range/performance. ● P2AF6 - Starter Relay 3 Stuck Off. ● P1CEA - Boost Side EVAP Purge System Performance. ● U0104 - Lost Communication With Cruise Control Module and U0405 - Invalid Data Received From Cruise Control Module may also be set. This software flash will allow these permanent fault codes to naturally clear. NOTE: If the software update is not completed, customers may have issues with registering vehicle in states with inspections due to the MIL being on (Only an issue if U0104/U0405 have set in life of vehicle). Other software improvements: ● Improvements related to fault codes P0300, P0301, P0302, P0303, P0304, P0305 and P0306 for cold start catalyst heating misfire. This bulletin involves reprogramming the PCM and Ignition System Control Module (ISCM) and the with the latest available software."
08-205-24 REV. A2024-10-14. Service bulletin. ENGINE; POWER TRAIN. "Flash: Ignition System Control Module (ISCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P2C30-00 - Ignition Coil Primary Circuit Fuse A. ● P2C31-00 - Ignition Coil Primary Circuit Fuse B. Customers may also comment on the following: ● Engine hesitates/misfires. This bulletin involves inspecting and possibly reprogramming the ISCM and the Powertrain Control Module (PCM) with the latest available software."
18-072-242024-09-25. Service bulletin. POWER TRAIN. "Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P018B - Fuel Pressure Sensor ""B"" Circuit Range/performance. ● P2AF6 - Starter Relay 3 Stuck Off. ● P1CEA - Boost Side Evap Purge System Performance. ● U0104 - Lost Communication With Cruise Control Module and U0405 - Invalid Data Received From Cruise Control Module may also be set. This software flash will allow these permanent fault codes to naturally clear. NOTE: If the software update is not completed, customers may have issues with registering vehicle in states with inspections due to the MIL being on (Only an issue if U0104/U0405 have set in life of vehicle). Other software improvements: ● Improved to low speed parking lot running behavior such as chugging/bucking/jumpiness. This bulletin involves reprogramming the PCM and Ignition System Control Module (ISCM) and the with the latest available software."
18-071-242024-09-25. Service bulletin. POWER TRAIN. "Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P018B - Fuel Pressure Sensor ""B"" Circuit Range/performance. ● P2AF6 - Starter Relay 3 Stuck Off. ● P1CEA - Boost Side EVAP Purge System Performance. ● U0104 - Lost Communication With Cruise Control Module and U0405 - Invalid Data Received From Cruise Control Module may also be set. This software flash will allow these permanent fault codes to naturally clear. NOTE: If the software update is not completed, customers may have issues with registering vehicle in states with inspections due to the MIL being on (Only an issue if U0104/U0405 have set in life of vehicle). Other software improvements: ● Improvements related to fault codes P0300, P0301, P0302, P0303, P0304, P0305 and P0306 for cold start catalyst heating misfire. This bulletin involves reprogramming the PCM and Ignition System Control Module (ISCM) and the with the latest available software."
08-205-242024-09-25. Service bulletin. POWER TRAIN; ENGINE. "Flash: Ignition System Control Module (ISCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P2C30-00 - Ignition Coil Primary Circuit Fuse A. ● P2C31-00 - Ignition Coil Primary Circuit Fuse B. Customers may also comment on the following: ● Engine hesitates/misfires. This bulletin involves reprogramming the ISCM and the Powertrain Control Module (PCM) with the latest available software."
91004092024-09-06. Service bulletin. POWER TRAIN. TRANSFER CASE Before replacing a transfer case unit for fault codes C1444-98 and/or C1477-4B, be sure to reference TSB 21-048-24 for potential transfer case shift motor replacement

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