RAM
08-339-26
Manufacturer communications
- Publication date
- 2026-09-24
- Received by NHTSA
- 2026-09-30
- NHTSA record numbers
- 11037585
Manufacturer summary
Original wording in English
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.
• 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.
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Ram
C0037-2FLeft Rear Wheel Speed Sensor - Signal ErraticRam
C0037-62Left Rear Wheel Speed Sensor - Signal Compare FailureRam
C003A-2FRight Rear Wheel Speed Sensor - Signal ErraticRam
C003A-62Right Rear Wheel Speed Sensor - Signal Compare FailureCheck vehicle applicability
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