# C003A on the 2024 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.

## Bulletins for this model year that name C003A

- [11037585](https://open.wenmarpro.com/bulletins/11037585), 2026-09-30: Max Tow Right and Left Rear Wheel Speed Sensors Inoperable Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● C003A\-62 \- Right Rear Wheel Speed Sensor \- Signal Compare Failure. ● C0037\-62 \- Left Rear Wheel Speed Sensor \- Signal Compare Failure. ● C003A\-2F \- Right Rear Wheel Speed Sensor \- Signal Erratic. ● C0037\-2F \- Left Rear Wheel Speed Sensor \- Signal Erratic. Customers may comment on one or more of the following: ● The check engine light is illuminated. ● The Anti\-Lock Brake System \(ABS\) light is illuminated. ● The Traction Control System \(TCS\) light is illuminated. ● The Forward Collision Warning \(FCW\) light is illuminated. ● The "4WD Unavailable" message is displayed in the Instrument Panel Cluster \(IPC\). ● Vehicle might not shift from Drive to Park or vice versa. NOTE: The vehicle safe hold systems are in place if the vehicle does not shift to Park. ● Vehicle will not shut off. This bulletin involves replacing both rear wheel speed sensors.
- [11025631](https://open.wenmarpro.com/bulletins/11025631), 2025-11-19: Max Tow Right and Left Rear Wheel Speed Sensors Inoperable Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● C003A\-62 \- Right Rear Wheel Speed Sensor \- Signal Compare Failure. ● C0037\-62 \- Left Rear Wheel Speed Sensor \- Signal Compare Failure. ● C003A\-2F \- Right Rear Wheel Speed Sensor \- Signal Erratic. ● C0037\-2F \- Left Rear Wheel Speed Sensor \- Signal Erratic. Customers may experience one or more of the following: ● The check engine light illuminates. ● The ABS light illuminates. ● The traction control light illuminates. ● The forward collision warning lamps light illuminates. ● The 4WD unavailable message on the Instrument Panel Cluster \(IPC\). ● Vehicle might not shift from drive to park or vice versa. The vehicle safe hold systems are in place if the vehicle does not shift to park. ● Vehicle will not shut off. This bulletin involves replacing both rear wheel speed sensors.
- [11011716](https://open.wenmarpro.com/bulletins/11011716), 2024-12-10: "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. "