P1EFE Diagnostic Trouble Code

P1EFE is a kind of OBD-II Diagnostic P-Powertrain Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a P1EFE diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Faulty IMRC actuator/sensor

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code P1EFE is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P1EFE.

Fortunately, P1EFE is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1EFE Trouble Code For Specific Cars

P1EFE Oldsmobile Ss Damper LF Circuit Short to Ground
P1EFE Fiat 8 Hp Lamp Dome Input Circuit Short To Battery
P1EFE De Dion Bouton Doctors HO2S Insufficient Switching Sensor 1
P1EFE Chevrolet Corvair Driver Side Satellite Communication Circuit Short to Ground
P1EFE Lotus Excel Traction Control Motor Circuit Short to Ground
P1EFE Jaguar Super Seat Driver Front Down Switch Circuit Failure
P1EFE Porsche Boxster Type 986 Fuel Pressure Regulator 1 Control Circuit Low