C0237 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C0237 – Erratic Rear Speed Signal
C0237 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C0237 Possible Causes
Faulty Rear Speed Sensor,Rear Speed Sensor harness is open or shorted,Rear Speed Sensor circuit poor electrical connection,Faulty EBCM
As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.