C003A on the 2022 Ram 3500
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 05-004-24 | 2024-12-10. Service bulletin. "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. " |
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| S2205000002 | 2024-03-18. Service bulletin. 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. |
| S2205000002 | 2023-10-02. Service bulletin. 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. |
| 9004400 | 2022-08-22. Service bulletin. 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. |
| S2205000002 | 2022-06-27. Service bulletin. C003A-2F Right Rear Wheel Speed Sensor, C0037-2F Left Rear Wheel Speed Sensor DTC?s Set While Driving With Payload Or Trailer Towing. |
5 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.