C1237
Speed Wheel Rear Input Signal Missing
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)
Symptoms
- ABS/ESP indicator is on
- Disabling the ABS/ESP system
- Incorrect operation of cruise control (if equipped)
Causes
- Rear wheel speed sensor malfunction
- Open or short circuit in wiring harness
- Impulse rotor is dirty or damaged
- Poor contact in the sensor connector
- ABS/ESP module malfunction
How to Fix
- Check the integrity of the sensor wiring harness
- Clean the contacts of the sensor connector
- Check the resistance of the wheel speed sensor
- Inspect the impulse rotor for damage
- If necessary, replace the wheel speed sensor