C0264 Diagnostic Trouble Code

C0264 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 C0264 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
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.
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 :

Now, clear the codes and test-drive the vehicle to see if the code is reset. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.

Process Tips

Diagnostic trouble code C0264 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 C0264.

Fortunately, C0264 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0264 Trouble Code For Specific Cars

C0264 Studebaker Daytona Lamp Turn Signal Right Circuit Failure
C0264 Lancia D50 Speed Wheel Sensor LR Circuit Open
C0264 Panther Solo Driver Side Airbag Fault
C0264 Nissan 350 CI Circuit Malfunction
C0264 Tvr 1600 Phone Handset Circuit Failure
C0264 Jensen 541 Seat Driver Recline Forward Circuit Short To Ground
C0264 Hispano Suiza Alfonso Pedal Correlation PDS1 and PDS2