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 Chrysler 300 Engine Oil Temperature Circuit Malfunction
P1EFE Mazda Taiki A/C Evaporator Air Temperature Circuit High
P1EFE Audi Q5 ASM Control Circuit [Up / Down / Auto / etc]
P1EFE Proton Satria Fuel Tank Pressure Sensor Circuit Failure
P1EFE Tvr Grantura Power Door Memory Lock Relay Circuit Short To Ground
P1EFE Cadillac Osceola Dim Panel Decrease Input Circuit Short To Ground
P1EFE Dodge Venom Ignition Tach Circuit Short To Battery