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Service bulletins for the 2021 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.

1129 on file from NHTSA, as of 2026-10-19.

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

Bulletins, newest first
S22250000042022-11-07. Service bulletin. FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); UNKNOWN OR OTHER. Customer complaint may include MIL-On/check engine lamp-on condition. Upon further inspection, a DTC for P0456-Small Leak Detected may be set in the PCM.
0300422REVA2022-10-31. Service bulletin. POWER TRAIN:DRIVELINE:DRIVESHAFT. Rear Propshaft Clunk This bulletin involves removing the rear driveshaft and greasing the slip yoke splines. The customer may describe the following: A clunk noise from the driveshaft while coming to a stop or when juststarting to tip into throttle at take off.
0300422REVA2022-10-31. Service bulletin. BACK OVER PREVENTION; POWER TRAIN:DRIVELINE:DRIVESHAFT. Rear Propshaft Clunk This bulletin involves removing the rear driveshaft and greasing the slip yoke splines. The customer may describe the following: A clunk noise from the driveshaft while coming to a stop or when juststarting to tip into throttle at take off.
03004222022-10-31. Service bulletin. BACK OVER PREVENTION; POWER TRAIN:DRIVELINE:DRIVESHAFT. Rear Propshaft Clunk This bulletin involves removing the rear driveshaft and greasing the slip yoke splines. The customer may describe the following: A clunk noise from the driveshaft while coming to a stop or when juststarting to tip into throttle at take off.
08144222022-10-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Drivetrain Control Module (DTCM) Diagnostic and System Improvements This bulletin involves reprogramming the DTCM with the latest available software. The technician may find one or more of the following DTCs: C1415-92 - Transfer Case Motor Current-Performance or Incorrect Operation. U1440 - Implausible Transfer Case Ratio High Received. U0403-00 - Implausible Data Received From T-case. C1403-92 - Transfer Case Range Position Sensor-Performance Or Incorrect Operation(2019-2020 Vehicles Only). If only DTC C1403 is present, follow normal diagnostic procedures before updating the DTCM. In addition the customer may describe one or more of the following:Traction Control System light is illuminated. A driveline bump can be heard/felt occasionally when the driver is steady on the throttle at about 20-30% on a flat road while in 4WD AUTO(2019-2020 Vehicles Only). An excessive electric motor clicking sound from the middle of the vehicle/transfer case area, when on and off the throttle(2019-2020 Vehicles Only). An excessive electric motor clicking sound with steering wheel movement, most notable in parking lot or low speed maneuvering(2019-2020 Vehicles Only). A ?Service 4WD? message/fault without commanding a transfer case shift(2019-2020 Vehicles Only).If only the ?Service 4WD? message/fault is displayed in the Instrument Panel Cluster (IPC) and no other symptom/conditions are present, follow normal diagnostic procedures before updating the DTCM(2019-2020 Vehicles Only). The blinking of the ?4WD Low? and ?4WD High? indicator lights at the same time, on the transfer case selector switch.If both 4WD indicator lights on the transfer case selector switch are blinking and no other symptom/conditions are present, follow normal diagnostic procedures before updating the DTCM(2019-2020 Vehicles Only). During highway/freeway speeds, a bump in the driveline may be felt. This could also be described as a harsh transmission shift(2019-2020 Vehicles Only).
1809122REVA2022-10-17. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTC: P219A - Bank 1 Fuel/Air Ratio Imbalance(North America Only). Customers may also experience one or more of the following: An engine stall at low engine mileage and mostly low vehicle speeds 16 - 24 kph (10 - 15 mph). LED light in the Start/Stop button will not illuminate when pressed.
21020212022-10-17. Service bulletin. WHEELS; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; STEERING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
21019212022-10-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN; WHEELS; ELECTRICAL SYSTEM; STEERING; ELECTRICAL SYSTEM:SOFTWARE. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
21018212022-10-17. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM; POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may describe one or more of the following:During a 2 - 3 transmission upshift, the engine is hitting rev limit. Hesitation feel during a pedal tip in, while engine is warming up below 1 °C (30 °F) ambient temp.
18050212022-10-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN; ELECTRICAL SYSTEM:SOFTWARE. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P0133 - O2 Sensor 1/1 Slow Response. P0153 - O2 Sensor 2/1 Slow Response. P0171 - Fuel System 1/1 Lean. P0174 - Fuel System 2/1 Lean. P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. P0307 - Cylinder 7 Misfire. P0308 - Cylinder 8 Misfire. B2286 - Calibration Not Learned / Lost Calibration. The customer may also experience one or more of the following:Hesitation feel during a pedal tip in, while engine is warming up below -1 °C (30 °F) ambient temp. During a 2 - 3 transmission upshift, the engine is hitting rev limit. ?Service Suspension? message in Instrument Panel Cluster (IPC) on start up.
18048212022-10-17. Service bulletin. PARKING BRAKE; AIR BAGS; ELECTRICAL SYSTEM; POWER TRAIN:MANUAL TRANSMISSION:CONTROL MODULE:SOFTWARE. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience the following:LED light in the Start/Stop button will not illuminate when pressed.
23019212022-10-17. Service bulletin. STRUCTURE:BODY:STEP/LADDER; AIR BAGS; POWER TRAIN. Power Side Steps Do Not Stow Or Deploy Properly This bulletin involves inspecting and if necessary replacing the driver or passenger power side step motor. Customers may notice one or more of the following:Power side steps do not stow or deploy properly. Information Panel Cluster (IPC) shows ?Obstacle Detection? fault.
742442022-10-17. Service bulletin. POWER TRAIN:DRIVELINE:HYDRAULIC:MOTOR/PUMP; POWER TRAIN. Warranty Bulletin D-20-23 Part Order Restriction Program - 48V Power Pack Unit (PPU) - Select 2018 - 2021 Jeep Wrangler (JL) and 2019 - 2021 RAM (DT) (Rev. A)
21020212022-10-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
21019212022-10-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the follwing:Unable to set desired gear manually from the steering wheel controls.
21018212022-10-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may describe one or more of the following:During a 2 - 3 transmission upshift, the engine is hitting rev limit. Hesitation feel during a pedal tip in, while engine is warming up below 1 °C (30 °F) ambient temp.
18050212022-10-17. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P0133 - O2 Sensor 1/1 Slow Response. P0153 - O2 Sensor 2/1 Slow Response. P0171 - Fuel System 1/1 Lean. P0174 - Fuel System 2/1 Lean. P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. P0305 - Cylinder 5 Misfire. P0306 - Cylinder 6 Misfire. P0307 - Cylinder 7 Misfire. P0308 - Cylinder 8 Misfire. B2286 - Calibration Not Learned / Lost Calibration. The customer may also experience one or more of the following:Hesitation feel during a pedal tip in, while engine is warming up below -1 °C (30 °F) ambient temp. During a 2 - 3 transmission upshift, the engine is hitting rev limit. ?Service Suspension? message in Instrument Panel Cluster (IPC) on start up.
18048212022-10-17. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. The customer may experience the following:LED light in the Start/Stop button will not illuminate when pressed.
742442022-10-17. Service bulletin. POWER TRAIN. Warranty Bulletin D-20-23 Part Order Restriction Program - 48V Power Pack Unit (PPU) - Select 2018 - 2021 Jeep Wrangler (JL) and 2019 - 2021 RAM (DT) (Rev. A)
S22080000732022-10-17. Service bulletin. POWER TRAIN. No Start, After Flash And Or PCM Replace, DTC P0513 Invalid Skim Key Setting
90045102022-10-17. Service bulletin. STRUCTURE; POWER TRAIN. FRAME, Front Seat Cushion If replacing this for a power seat does not move, refer to STAR parts section 050 - Interior Trim 905.02 - Adjusters, Recliners, Shields and Risors - Drivers Seat, Power Seat Motors The motors are available separately from the frame Assembly
19001222022-10-17. Service bulletin. POWER TRAIN; STEERING. Steering Rack and Pinion - Rattle, Squeak or Clunk Noise This bulletin involves replacing the two steering rack and pinion mounting fasteners if necessary. The customer may notice the following:A clunk, squeak or rattle coming from the steering rack and pinion that may be felt through the steering wheel.
S21210000152022-10-17. Service bulletin. POWER TRAIN. Driveline Clunk When Stopping Or Upon Take Off Launch Immediately After A Stop
03003212022-09-26. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. Front Axle Assembled With Incorrect Circlip This bulletin involves replacing the right side halfshaft circlip. Customers may comment on the following: There is a loud grinding noise from under the front passenger side of the vehicle.
21005212022-09-26. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. Customers may experience the following on a vehicle with less than 644 km (400 miles) on the odometer: A Malfunction Indicator Lamp (MIL) event or failure withnoDiagnostic Trouble Codes (DTCs) and the vehicle has less than 644 km (400 miles) on the odometer indicates it is likely the vehicle has experienced an unintentional code clear event.Do not use this software update if vehicle odometer has over 644 km (400 miles).

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