C212C Diagnostic Trouble Code

C212C 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 C212C diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
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)
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

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.

Process Tips

Diagnostic trouble code C212C 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 C212C.

Fortunately, C212C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C212C Trouble Code For Specific Cars

C212C Austin Sports Aux A/C Control Switch Reference Circuit Short to Battery
C212C Opel Trixx Door Handle Switch Circuit Failure
C212C Nissan Sports Cruise Control Set Signal Malfunction
C212C Bmw 118 Calibration Resistor Out Of Range
C212C Turner 950 Pedal Position Sensor C Circuit Intermittent
C212C Chevrolet Tahoe Electronic Throttle Monitor Data Available
C212C Mercury Mountaineer Air Suspension Rear Height Sensor Low Signal Circuit Short To Ground