C3314 Diagnostic Trouble Code

C3314 is a kind of OBD-II Diagnostic C-Chassis 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 C3314 diagnostic trouble code may include:

Faulty or damaged wiring
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
Poor fuel economy
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

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

Process Tips

Diagnostic trouble code C3314 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 C3314.

Fortunately, C3314 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3314 Trouble Code For Specific Cars

C3314 Vauxhall Magnum Pressure Control Solenoid A Control Circuit Range/Performance
C3314 Lancia Trevi Starter Disable Circuit Malfunction
C3314 Peel P50 Driver's Door Unlock Relay Circuit Failure
C3314 Daihatsu Consorte Gear Shift Module Communication Circuit
C3314 Chrysler Voyager Exhaust Pressure Sensor Range/Performance
C3314 Bmw X5 Column Reach Feedback Potentiometer Circuit Short to Battery
C3314 Porsche 550 Front Sounder Circuit Failure