P055C Diagnostic Trouble Code

P055C 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 P055C diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. 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 P055C 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 P055C.

Fortunately, P055C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P055C Trouble Code For Specific Cars

P055C Nissan Almera Climate Control A/C Pressure Switch Circuit Failure
P055C Secma Fun 440 Insufficient Coolant Temperature for Stable Operation
P055C Porsche 911 Type 997 Fuel Composition Sensor Circuit High Input
P055C Mercedes E 280 ABS Power Relay Output Short Circuit To Battery
P055C Pontiac Sunbird Fog Lamp Switch Failure
P055C Mazda Rx-3 A Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)
P055C Jaguar Xk8 Seat Driver Occupied Switch Circuit Short To Battery