C12DA Diagnostic Trouble Code

C12DA 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 C12DA diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
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 :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Faulty IMRC actuator/sensor

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. 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.

Process Tips

Diagnostic trouble code C12DA 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 C12DA.

Fortunately, C12DA is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C12DA Trouble Code For Specific Cars

C12DA Plymouth Trail Duster Exhaust Gas Recirculation Circuit Range/Performance
C12DA Subaru Impreza 3 Left Rear Sensor Circuit Failure
C12DA Jaguar Mark Seat Driver Forward/Backward Motor Stalled
C12DA Bizzarrini A3c Brake Pressure Switch Mechanical Failure
C12DA Bmw Serie 6 Clutch Solenoid Circuit Malfunction
C12DA Porsche 718 Front Sounder Circuit Short to Vbatt
C12DA Puma Gtb Fuel Temperature Sensor #1 Circuit Short to Ground