P12A4 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P12A4 – Fuel Rail Pump Control Valve Stuck Closed

 

P12A4 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P12A4 Possible Causes

 

Faulty Fuel Rail Pump Control Valve,Fuel Rail Pump Control Valve harness is open or shorted,Fuel Rail Pump Control Valve circuit poor electrical connection

 

P12A4 Description

 

The Engine Control Module (ECM) monitors the Fuel Rail Pump Control Valve. The ECM sets the OBDII code when the Fuel Rail Pump Control Valve is not to factory specifications.