C202C Diagnostic Trouble Code

C202C 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 C202C diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
Fuel with a large percentage of sulfur will clog the DPF quickly

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. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code C202C 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 C202C.

Fortunately, C202C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C202C Trouble Code For Specific Cars

C202C Plymouth Barracuda Evaporative Emission Control System Leak Detected
C202C Fageol Fageol Injector Circuit Malfunction - Cylinder 10
C202C Renault Nerva Grand Sport Heated Backlite Relay Short To Ground
C202C Gkn Fff Output Speed Sensor No Signal
C202C Toyota Hilux Oil Level Lamp Circuit Open
C202C Caterham Super 7 Door Handle Right Front Circuit Open
C202C Daihatsu Taft Glow Plug/Heater Circuit "A" Malfunction