C1156 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1156 – Speed Wheel Sensor Communication Circuit
C1156 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1156 Possible Causes
Faulty Steering Angle Sensor,Steering Angle Sensor harness is open or shorted,Steering Angle Sensor circuit poor electrical connection,Faulty ABS Actuator and Electric Unit (Control Unit),CAN communication line
The steering angle sensor is connected to the Anti-Lock Brake System (ABS) Actuator and Electric Unit (Control Unit) in addition to Control Area Network (CAN) lines. CAN is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.