P103F Diagnostic Trouble Code

P103F 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 P103F diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

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. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code P103F 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 P103F.

Fortunately, P103F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P103F Trouble Code For Specific Cars

P103F Nissan Grand Clutch Position Sensor Circuit Malfunction
P103F Citroen C4 Cactus FTS Low - Fuel Pump Temperature Sensor Low
P103F Pontiac Grand Safari Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 2)
P103F Proto Spirra Fuel Restriction Condition
P103F Chevrolet Intimidator Dynamic Stability Control Right Front Valve Malfunction
P103F Honda Stream Reverse Inhibit Control Circuit Malfunction
P103F Ford Aero LF LAMP HIGH BEAM CIRCUIT Short to Battery