WenmarOpen by Wenmar Pro

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
08047212022-09-26. Service bulletin. ELECTRICAL SYSTEM. Door Control Module Window Inoperative This bulletin involves replacing one or both of the door modules. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or moreof the following Diagnostic Trouble Codes (DTCs) have been set: B18BA-12 - Window Control - Circuit Short to Battery B18BA-13 - Window Control - Circuit Open In addition the customer may notice one or more of the following:Driver and/or passenger windows stop working. If window switch is held in the up position for two seconds the obstructionautodown function, may not work. Windows may go up slower than expected.
23012212022-09-26. Service bulletin. STRUCTURE. Driver Side Rambox Opens By Itself Unprompted This bulletin involves removing the driver side Rambox and replacing the Rambox door lock actuator wiring harness with a jumper wiring harness. The customer may comment on one or more of the following:Every time the vehicle is unlocked the driver side Rambox opens. Driver side Rambox opens for no reason.This can happen while the vehicle is sitting over night, or if the vehicle is left unlocked.
08042212022-09-26. Service bulletin. ELECTRICAL SYSTEM. Flash: Body Control Module (BCM) Updates This bulletin involves updating the BCM with the latest available software. Customer may comment that the hill descent button is inoperative.
08037212022-09-26. Service bulletin. ELECTRICAL SYSTEM. Flash: Hybrid Control Processor (HCP) Updates This bulletin involves updating the HCP with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs). P1A26-00 - BPCM Hybrid Battery State Of Charge Performance. P0A7E-00 - Hybrid/EV Battery Pack Over Temperature. U1003-00 - ESP Can C Bus Performance. P2534-00 - Ignition Switch Run/Start Position Circuit Low. P0506 - Idle Speed Performance Lower Than Expected. P0507 - Idle Speed Performance Higher Than Expected. One Trip DTC Changed to a Two Trip DTC.P0AC6-00 - Hybrid/Ev Battery Temperature Sensor 2 Circuit Performance. P0ACB-00 - Hybrid/Ev Battery Temperature Sensor 3 Circuit Performance. U0121-00 - Lost Communication With Anti-Lock Brake System (ABS) Control Module. U0140-00 - Lost Communication With Body Control Module. U1818-00 - Lost Communication With ECM/PCM On D-PT Can. U0100-00 - Lost Communication With ECM/PCM. U0102-00 - Lost Communication With Transfer Case Control Module / AWD. U1003-00 - ESP Can C Bus Performance. P0562 - Battery/System Voltage Low. P060C-00 - Internal Control Module Main Processor Performance. U0415-00 - Implausible Data Received From ABS. U1850-00 - Implausible Data Received From PCM on D-PT. Two Trip DTC Changed to a One Trip DTC.P0E52-00 - DC/DC Converter Current Sensor Circuit A Range/Performance. P0C39-00 - DC/DC Converter Temperature Sensor 1 Performance. P0C3E-00 - DC/DC Converter Temperature Sensor 2 Performance. P0E59-00 - DC/DC Converter Temperature Sensor C Circuit Range/Performance. P0E32-00 - DC/DC Converter Voltage Sensor 1 Performance. P0E37-00 - DC/DC Converter Voltage Sensor 2 Performance. P2C8D-00 - DC/DC Converter Temperature Sensor "D" Circuit Range/Performance. P2535-00 - Ignition Switch Run/Start Position Circuit High. P2534-00 - Ignition Switch Run/Start Position Circuit Low.
18028212022-09-26. 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, a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P0524 - Low oil pressure (during start up in cold ambient temps). P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P02E8-00 - Diesel Intake Air Flow Position Sensor Circuit Low. P20FB-00 - Reductant Pump 2 Control Performance. P065A-00 - Generator System Performance. P00AF-00 - Turbocharger Boost Control Module "A" Performance. P200A-00 - Intake Manifold Runner Performance - Bank 1. P200B-00 - Intake Manifold Runner Performance - Bank 2. P0106-00 - Manifold Absolute Pressure Sensor Performance. Customers may experience the following:Radio may reset during engine idle. Electronic Throttle Control (ETC) lamp turns on. After a long cold soak a stumble/hesitation is felt during the first few light accelerations. Turbo Surge in park or neutral and high Idle. The cruise control and speed limited set speed doesn?t match the speedometer. It could be up to 2.5 kpm (1.5 mph) difference. Other Software enhancements:Speedometer accuracy improvement(s). Cruise control updates. Battery durability improvements in hot ambient temperatures. Improved idle quality during remote start.
21005212022-09-26. 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 following on a vehicle with less than 64 km (40 miles) on the odometer:A Malfunction Indicator Lamp (MIL) event or failure withnoDiagnostic Trouble Codes (DTCs) and the vehicle has less than 40 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 64 km (40 miles).
23011212022-09-26. Service bulletin. STRUCTURE:BODY:TAILGATE; STRUCTURE. Tailgate High Closing Effort This bulletin involves installing a tailgate pivot cup shim. The customer may comment that tailgate is difficult to open/close.
S1723000001RevC2022-09-26. Service bulletin. VISIBILITY. Left Hand Drivers Side Mirror Takes Longer to Defrost Or Clear Than Right Side Passenger
S1623000028RevD2022-09-26. Service bulletin. VISIBILITY. Outside Power Fold Rearview Mirror Appears Loose Or Shakes
S21080000832022-09-26. Service bulletin. POWER TRAIN. 4Wheel Drive Lamp On, DTC C141C-13-REAR DIFFERENTIAL CONTROL-CIRCUIT OPEN
S21080000822022-09-26. Service bulletin. ELECTRICAL SYSTEM; INTERIOR LIGHTING. Interior Lighting Inoperative, Dome, Reading, Glove Box, Center Console, Vanity Lamp, Rambox Lighting
S21080000812022-09-26. Service bulletin. PARKING BRAKE. Electronic Parking Brake (EPB) DTC?s Setting For Opposite Side of vehicle. EPB Circuits Swapped
S21080000802022-09-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Radio Replacement Reset Routine, Radio Has Missing Icons Or Are Grayed Out
S2008000126RevD2022-09-26. Service bulletin. ELECTRICAL SYSTEM. RKE Has Reduced Range, Remote Start Inoperative, Multiple Keyless Go Push Attempts To Start, Key Not Detected Message, Tire Pressure Warning Lamp On
S1924000019RevB2022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. Customer Indicates That Temperature Varies From Side To Side Being Colder On One Side Compared To The Other.
S1808000097RevA2022-09-26. Service bulletin. ELECTRICAL SYSTEM; BACK OVER PREVENTION. Back Up Camera Inoperative Complaints, Radio Display Blue Or Blank When Placed In Reverse
S21180000022022-09-26. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Customer complaint may include a Mil-on condition that may be accompanied by a ?misfire? feel or rough-running engine condition. Upon further investigation, any of the following DTCs may be found in the PCM:
S21080000762022-09-26. Service bulletin. ENGINE AND ENGINE COOLING. CEL Check Engine Lamp On, DTC P00F9 Supercharger-Turbocharger Outlet Pressure Sensor Range Performance
S21230000182022-09-26. Service bulletin. STRUCTURE; VISIBILITY:WINDSHIELD. Wind Noise From Driver Side Windshield Cowl Area
S21240000042022-09-26. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C does not cool and vehicle is low on Freon charge but no leak is found with sniffer or black light anywhere in the system
S21080000712022-09-26. Service bulletin. ELECTRICAL SYSTEM. Cluster Displays Service Active Dampening System Message, DTC B2286 Calibration Not Learned ? Lost Calibration
S21050000022022-09-26. Service bulletin. ELECTRICAL SYSTEM. ESC ABS MIL light on DTC?s P0507, P04FC, P2172 set
S21080000692022-09-26. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; EQUIPMENT. SXM Channels Inoperative Above Channel 450
S21080000672022-09-26. Service bulletin. ELECTRICAL SYSTEM. Electronic Throttle Control Message And MIL Displayed. In Some Cases Rear Park Assist Temporarily Unavailable. U02BE Is Active And TRSCM Is Offline
S21080000662022-09-26. Service bulletin. AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:STATUS INDICATOR LAMP/LIGHT. Check Engine Lamp On, P2504 Charge System Output High

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