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Service bulletins for the 2021 Ram 3500

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.

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

About C0037 on the 2021 Ram 3500: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: C0037 are shown. Show all

Bulletins, newest first
05-004-242024-12-10. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM. "Brake Warning Lamp Illumination Over Rumble Strips 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: ● C003A-2F - Right Rear Wheel Speed Sensor - Signal Erratic. ● C0037-2F - Left Rear Wheel Speed Sensor - Signal Erratic. Customers may also comment on the following: ● Automatic Brake System (ABS) lamp and Electronic Stability Control (ESC) lamp turn on when driving over rumble strips. This bulletin involves replacing one or both rear wheel speed sensors. "
S22050000022024-03-18. Service bulletin. WHEELS. C003A-2F Right Rear Wheel Speed Sensor, C0037-2F Left Rear Wheel Speed Sensor Diagnostic Trouble Codes (DTCs) Set While Driving With Payload Or Trailer Towing.
S22050000022023-10-02. Service bulletin. WHEELS. C003A-2F Right Rear Wheel Speed Sensor, C0037-2F Left Rear Wheel Speed Sensor Diagnostic Trouble Codes (DTCs) Set While Driving With Payload Or Trailer Towing.
90044002022-08-22. Service bulletin. WHEELS. AXLE ASSEMBLY, Rear Complete On dual rear wheel high output trucks displaying wheel speed DTCs C003A-2F RR WSS or C0037-2F LR WSS, but for which diagnostics are not finding any hardware problems, and for which the customer narrative includes comments about driving on highway rumble strips, please do not replace the axle, wheel speed sensors, harness, and/or ABS module. Engineering is working to determine a root cause, please clear the codes and encourage the driver to avoid rumble strips until a repair becomes available. If this issue does not describe your concern, please proceed with repair.
S22050000022022-06-27. Service bulletin. EQUIPMENT; WHEELS; TRAILER HITCHES; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:WHEEL SPEED SENSOR/TONE RING. C003A-2F Right Rear Wheel Speed Sensor, C0037-2F Left Rear Wheel Speed Sensor DTC?s Set While Driving With Payload Or Trailer Towing.

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