P1C09 – 12V Battery Relay Performance Or Stuck On

P1C09 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1C09 Possible Causes

Faulty 12V Battery Relay,12V Battery Relay harness is open or shorted,12V Battery Relay circuit poor electrical connection

P1C09 Description

The Engine Control Module (ECM) monitors the 12V Battery Relay. The ECM sets the OBDII code when the 12V Battery Relay is not to factory specifications.