C20C3 Diagnostic Trouble Code

C20C3 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 C20C3 diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

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. 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 C20C3 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 C20C3.

Fortunately, C20C3 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C20C3 Trouble Code For Specific Cars

C20C3 Renault Fuego Glow Plug Circuit High Input (Bank #2)
C20C3 Du Pont Touring Illuminated Entry Input Open Circuit
C20C3 Tata Nano Mirror Passenger Vertical Feedback Potentiometer Circuit Short to Ground
C20C3 Chevrolet Caprice Driver Power Window Motor Circuit Short To Ground
C20C3 Bmw Formula Climate Control Temperature Differential Circuit Short To Ground
C20C3 Renault Dauphine Gear Shift Position Circuit Low
C20C3 Ford Cougar Main Catalyst Efficiency Below Threshold (Bank 1)