P1BFE Diagnostic Trouble Code

P1BFE 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 P1BFE diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Faulty IMRC actuator relay (if equipped)

Repair Processes :

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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code P1BFE 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 P1BFE.

Fortunately, P1BFE is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1BFE Trouble Code For Specific Cars

P1BFE Marathon Corsaire Traction Motor Encoder circuit Failure
P1BFE Mercedes-benz A Class Air Bypass Valve Circuit Malfunction
P1BFE Mercedes C 270 ABS Inlet Valve Coil LF Circuit Short To Ground
P1BFE Dodge Sprinter Ignition Start Circuit Failure
P1BFE Porsche 356 Front Lateral Accelerometer Circuit Failure
P1BFE Kia Forte Ii Seat Switch Reference Voltage Positive Common Open Circuit
P1BFE Daewoo Musiro Gauge Drive Current Fault