C20E1 Diagnostic Trouble Code

C20E1 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 C20E1 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
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.
Dirty air cleaner element Damaged DPF

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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 the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code C20E1 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 C20E1.

Fortunately, C20E1 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C20E1 Trouble Code For Specific Cars

C20E1 Volvo 242
C20E1 Armstrong Siddeley Special Air Suspension Rear Height Sensor High (SE) Signal Circuit Short To Ground
C20E1 Seat Cordoba Injector Circuit Open / Shorted - Cylinder #4
C20E1 Mazda Washu A/C Post Heater Sensor #2 Circuit Failure
C20E1 Daimler De Headlamp Mode Select Circuit Failure
C20E1 Goggomobil Super Passenger Door Ajar Circuit Open
C20E1 Peugeot Partner Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage/IAT - B Circuit High Input