Speed Wheel Rear Input Signal Missing
Table of contents
C1237 MERCURY Possible Causes
- Faulty Rear ABS Sensor
- Rear ABS Sensor harness is open or shorted
- Rear ABS Sensor circuit poor electrical connection
- Faulty Wheel Speed Sensor
- Wheel bearing
How do I fix code C1237 MERCURY?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- There is a Factory Service Bulletin for the 2002-2004 Mercury Mountaineer:
- 2002-2004 Mercury Mountaineer Factory Service Bulletin OBDII Code C1237
Cost of diagnosing the C1237 MERCURY code
The cost of diagnosing the C1237 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C1237 MERCURY Description
The Anti-Lock Brake System (ABS) Actuator And Electric Unit (Control Unit) monitors the Rear Anti-Lock Brake Sensor. The ABS Actuator And Electric Unit sets the OBDII code when the Rear Anti-Lock Brake Sensor is not to factory specifications.