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

 

C1109 Description

 

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.