P0755 Diagnostic Trouble Code

P0755 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 P0755 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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.

Process Tips

Diagnostic trouble code P0755 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 P0755.

Fortunately, P0755 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0755 Trouble Code For Specific Cars

P0755 Ferrari 312 Insufficient Engine Speed Decrease During Self Test
P0755 Bentley S2 Battery Voltage High
P0755 Benz 37 Boost Calibration High
P0755 Allard K1 Air Bag Driver Circuit Failure
P0755 Aberdonia 16 A/C Refrigerant Pressure Sensor Circuit Range/Performance
P0755 Porsche 804 Front Washer Input Short to Ground
P0755 Opel Kadett Dimmer switch Circuit Short to Gnd