P120F Diagnostic Trouble Code

P120F 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 P120F diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code P120F 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 P120F.

Fortunately, P120F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P120F Trouble Code For Specific Cars

P120F Mercedes E 350 Accelerate Warmup Solenoid Circuit Malfunction
P120F Royce 10 Hp Ignition Key-In Circuit Short To Ground
P120F Saturn Sports Inertia Switch Activated
P120F Ford Mondeo 3 Mirror Driver/Passenger Switch Circuit Failure
P120F Paige Paige Driver Mirror Power Driver Circuit Short Ground
P120F American Speedster Air Suspension Height Sensor Power Circuit Short To Ground
P120F Isuzu Gemini