C0255 Diagnostic Trouble Code

C0255 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 C0255 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
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
Faulty IMRC actuator relay (if equipped)

Repair Processes :

If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. 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. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code C0255 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 C0255.

Fortunately, C0255 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0255 Trouble Code For Specific Cars

C0255 Cadillac Cts Decklid Ajar Rear Door Circuit Short To Ground
C0255 Seat Leon Injector Control Pressure Sensor Above / Below Desired
C0255 Cadillac 60 Damper RF Circuit Open
C0255 De Dion Bouton Doctors HO2S Insufficient Switching Sensor 1
C0255 Armstrong Siddeley Special Air Suspension Rear Height Sensor High (SE) Signal Circuit Short To Ground
C0255 Maserati 430 Transmission Fluid Pressure Sensor/Switch A Circuit
C0255 Opel Corsa C Decklid Release Circuit Short To Ground