C051C Diagnostic Trouble Code

C051C 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 C051C diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
Dirty air cleaner element Damaged DPF

Repair Processes :

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. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code C051C 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 C051C.

Fortunately, C051C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C051C Trouble Code For Specific Cars

C051C Berkeley Foursome B-pillar Power Sliding Door Open/Close Switch Input Ckt Short to Gnd
C051C Hyundai Tucson Iii
C051C Renault P55 Heated Catalyst Temperature Below Threshold (Bank 1)
C051C Dodge Avenger
C051C Noble M12 Cylinder 10 Contribution/balance Fault
C051C Panhard Cd Driver Power Window Down Circuit Short To Ground
C051C Bizzarrini Manta Brake Switch Out Of Self Test Range