P1EF3 Diagnostic Trouble Code

P1EF3 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 P1EF3 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code P1EF3 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 P1EF3.

Fortunately, P1EF3 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1EF3 Trouble Code For Specific Cars

P1EF3 Land Rover Range Rover Steering VAPS II Circuit Loop Short To Ground
P1EF3 Lincoln 47 Hp Throttle Position (TP) Sensor Circuit Intermittent High Voltage
P1EF3 Nissan Phaeton Cooling Fan 2 Control Circuit Malfunction
P1EF3 Ford Ba Falcon License Lamp Circuit Failure
P1EF3 Tornado Thunderbolt Motor Relay # 1 Circuit Failure
P1EF3 Porsche 930 Fuel Demand Command Signal Circuit Malfunction
P1EF3 Honda Acura Rsx Pressure Control Solenoid B Stuck On