C0696 Diagnostic Trouble Code

C0696 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 C0696 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
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)
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 :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C0696 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 C0696.

Fortunately, C0696 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0696 Trouble Code For Specific Cars

C0696 Mercury Messenger Air Suspension Rear Height Sensor High (SE) Signal Circuit Open
C0696 Holden Lc Power Steering Pressure sensor Circuit Intermittent
C0696 Nissan 270 Chime Input Request Circuit Short To Ground
C0696 Lada Vesta Shift Solenoid C Malfunction
C0696 Chevrolet Superior Electronic Throttle Monitor Cruise Disable
C0696 Maserati 228 Transmission Clutch Interlock Safety Switch Circuit Failure
C0696 Nsu Ro Cylinder 11 Misfire Detected