C279C Diagnostic Trouble Code

C279C 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 C279C diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
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 :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code C279C 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 C279C.

Fortunately, C279C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C279C Trouble Code For Specific Cars

C279C Bmw 2500 Camshaft Position Sensor Circuit Range/Performance
C279C Buick Estate Cylinder 7 Injector Circuit Low
C279C Honda Jazz 2 Purge flow Sensor Circuit High Input
C279C Holden Vp Pressure Control Solenoid "A" Short Circuit
C279C Renault 18 Gear 3 Incorrect ratio
C279C Suzuki Ignis Ii Mirror Driver Down Circuit Failure
C279C Fiat Bravo Lamp Headlamp Input Circuit Short To Battery