C1020 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C1020 – Left Rear Wheel Speed Sensor Circuit


C1020 Possible Symptoms


Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)


C1020 Possible Causes


Faulty Left Rear Wheel Speed Sensor,Left Rear Wheel Speed Sensor harness is open or shorted,Left Rear Wheel Speed Sensor circuit poor electrical connection,Faulty Anti-Lock Brake System (ABS) Module


C1020 Description


The Anti-Lock Brake System (ABS) Module monitors the Left Rear Wheel Speed Sensor. The ABS Module sets the OBDII code when the Left Rear Wheel Speed Sensor is not to factory specifications.