C0779 Diagnostic Trouble Code

C0779 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 C0779 diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. 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. 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.

Process Tips

Diagnostic trouble code C0779 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 C0779.

Fortunately, C0779 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0779 Trouble Code For Specific Cars

C0779 Chevrolet Camaro 6 Driver Power Window Motor Circuit Short To Battery
C0779 Honda Fit PRNDL Reverse Input Circuit Failure
C0779 Pontiac Salsa Flash To Pass Switch Circuit Failure
C0779 Buick Estate Cylinder 7 Injector Circuit Low
C0779 Mazda Bt50 Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Ground
C0779 Opel Diplomat Dim Panel Decrease Input Circuit Failure
C0779 Triumph 2000 Passengers Seat Belt Buckle Switch Circuit Short to Battery