C1109 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1109 – Power And Ground System
C1109 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1109 Possible Causes
Faulty Anti-Lock Brake System (ABS) Module Actuator (Electrical / Control Unit),ABS Module harness is open or shorted,ABS Module circuit poor electrical connection,Blown ABS Module fuse,Low battery voltage
The Anti-Lock Brake System (ABS) Module Actuator (Electrical / Control Unit) monitors the power supplies. The C1109 OBDII code is set when the ABS Module power supply voltage is lower than normal.