C1138 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1138 – 4-Wheel Active Steer Circuit
C1138 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1138 Possible Causes
Faulty Anti-Lock Brake System (ABS) Actuator and Control Unit,4WAS System
The ABS actuator and electric unit (control unit) and the 4-Wheel Active Steer (4WAS) control unit exchange signals via the Controlled Area Network (CAN) communication line.