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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.

By type

By component

By trouble code

By topic

Bulletins, newest first
S23180000022023-02-13. Service bulletin. EXTERIOR LIGHTING. Malfunction Indicator Lamp (MIL) Illumination. Intake Manifold Runner Valve Diagnostic Trouble Codes (DTCs) Setting In Extreme Cold Ambient Temperatures.
S1623000028 Rev.2023-02-13. Service bulletin. VEHICLE SPEED CONTROL; BACK OVER PREVENTION; POWER TRAIN; VISIBILITY; PARKING BRAKE. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
S1918000013 Rev.2023-02-13. Service bulletin. ELECTRICAL SYSTEM:STARTER ASSEMBLY. Crank, No Start Condition, Diagnostic Trouble Code (DTC) P0688 - Auto Shutdown Relay Sense Circuit
S23240000022023-02-13. Service bulletin. EQUIPMENT:ELECTRICAL. Customer Indicates Heat Is Blowing Warm Not Hot.
S23230000082023-02-13. Service bulletin. VEHICLE SPEED CONTROL; AIR BAGS; BACK OVER PREVENTION. Buzz Squeak Or Rattle Noise From Left Side Driver Door Area.
S23230000042023-02-13. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Defogger Is Not Working. Terminal Detached From The Glass.
S23230000022023-02-13. Service bulletin. EQUIPMENT:ELECTRICAL. Washer Light On And Will Not Turn Off After Adding Washer Solvent.
91001002023-02-13. Service bulletin. POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT:SEAL. Front Drive Shaft If replacing DT 5.7L front propeller shaft for concerns of a noise, please contact FCA Redacted Content prior to ordering part to create a FasTrack for return to analyze. If no response in 15 min, proceed with repair.
90041482023-02-13. Service bulletin. VEHICLE SPEED CONTROL. SPEAKER, 6"x9" Right or Left For a buzz, squeak or rattle (BSR) concern coming from the door speaker area please check that when removing the door trim panel, it doesn't come off with the two-stage push-pin clips (in vehicles that have this type of clip, not the ones with a screw) ONLY with its outer clip. If found to have any clip coming with both inner and outer part, please replace the clips with new ones (as old ones might have already been deformed) and reinstall the door trim. Follow Service Library procedure to properly remove/install the door trim. For this issue send feedback via email to FCA Redacted Content. If no response in 15 minutes, proceed with repair. Contact Us for feedback related ONLY to this GPOP Tech Tip. DO NOT email regarding repair procedures unrelated to this Tech Tip or part order inquires. Please include the Part Number(s) and Tech Tip Part Description of the Tech Tip you are referencing for our tracking systems.
91000202023-02-13. Service bulletin. VEHICLE SPEED CONTROL; SEAT BELTS. LATCH Front Door,LATCH, Rear door, Front Door 2022 to 2024 RAM (DT) Inside door lock rod binding. If customer comes in with the issue described, please adjust interior trim panel and rod to verify proper assembly and check if the issue goes away before replacing the latch. Please contact FCA Redacted Content. If no response in 15 minutes, proceed with repair.
23051222023-01-23. Service bulletin. EQUIPMENT. RamBox Applique Separation/Delamination
18148222023-01-23. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM. Powertrain Control Module (PCM) Updates
91000962023-01-17. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS; EXTERIOR LIGHTING. Base Headlamp Bright, Base Headlamp Black
91000082023-01-17. Service bulletin. ELECTRICAL SYSTEM. Telematic box module 2
08144222023-01-17. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. 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).
1809122REVA2023-01-17. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. 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.
S22080001432023-01-17. Service bulletin. VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Driver And Passenger Window Make a Small Window Reversal After Stopping the Express Up Request at The Mid-way Point And Re-engaging The Express Up Request
S2121000015RevB2023-01-17. Service bulletin. POWER TRAIN. Driveline Clunk When Stopping Or Upon Take Off Launch Immediately After A Stop
S1908000193RevA2023-01-17. Service bulletin. LANE DEPARTURE. The Tailgate Ajar Warning Lamp Does Not Illuminate
S22080001382023-01-17. Service bulletin. ELECTRICAL SYSTEM; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. Decreased Remote Start And RKE Range. Tire Pressure Sensors Values Are Not Displayed
03003212023-01-17. Service bulletin. POWER TRAIN. 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.
08100212023-01-17. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT; ELECTRICAL SYSTEM. UAQ UCQ UAV, UCX, UAX and UCV Radio Over The Air Software Version Updates This bulletin provides information regarding the latest Flash Over The Air (FOTA) update and provides the service technician an overview of the steps a customer will need to take to complete the update. Once the FOTA has been completed, the software level will be 39.6.Review the table below to determine when the FOTA is due to be release. The release time is based on the current radio?s software application level. Customers may experience one or more of the following: Intermittently, when going into reverse, the rear view camera screen is blank. Intermittently, gridlines are not on the display screen when in reverse.
14005212023-01-17. Service bulletin. FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM. Fuel Line Blockage This bulletin involves replacing the engine fuel/EVAP forward line bundle. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set: P0174 - Fuel System 2/1 Lean. In addition, the customer may notice one or more of the following conditions:Reduced acceleration. Rough starting.
21005212023-01-17. Service bulletin. POWER TRAIN; ELECTRICAL SYSTEM. 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).
23023212023-01-17. Service bulletin. STRUCTURE. Tonneau Cover Broken Strap This bulletin involves repairing broken tri-fold tonneau cover retention straps. Customers may comment on the following: One or more of the tri-fold tonneau cover retention straps have torn off the frame assembly

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