P12A1 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P12A1 – Fuel Rail Pressure Sensor Inappropriately Low

 

P12A1 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P12A1 Possible Causes

 

Faulty Fuel Rail Pressure Sensor,Fuel Rail Pressure Sensor harness is open or shorted,Fuel Rail Pressure Sensor circuit poor electrical connection

 

P12A1 Description

 

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