C0767 Diagnostic Trouble Code

C0767 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 C0767 diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. 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. 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.

Process Tips

Diagnostic trouble code C0767 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 C0767.

Fortunately, C0767 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0767 Trouble Code For Specific Cars

C0767 Mazda Mazda 5 Turbo/Super Charger Turbine Overspeed
C0767 Ford Explorer Iii Memory 2 Switch Circuit Short To Battery
C0767 Volkswagen Gti Ride Control RR Shock Actuator Circuit Short To Battery
C0767 Lamborghini 350 Shift Solenoid E Performance or Stuck Off
C0767 Chenard Walcker Straight-eight Door Unlock Disarm Switch Circuit Failure
C0767 Pontiac Salsa Flash To Pass Switch Circuit Failure
C0767 Hyundai Xg