P1F01 Diagnostic Trouble Code

P1F01 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 P1F01 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Diminished fuel efficiency

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.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code P1F01 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 P1F01.

Fortunately, P1F01 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1F01 Trouble Code For Specific Cars

P1F01 Suzuki Ignis Microphone Input Signal Circuit Open
P1F01 Plymouth Duster Evaporative Emission Control System Pressure Sensor Range/Performance
P1F01 Frazer Nash Sebring NVM Alarm Data Failure
P1F01 Ginetta G5 Output Speed Sensor Intermittent
P1F01 Mg X80 Ambient Air Temperature Sensor Circuit
P1F01 Lexus Ls TCM Power Relay Sense Circuit Range/Performance
P1F01 Bristol Blenheim Crankshaft Position Sensor A Circuit Malfunction