C20DA Diagnostic Trouble Code

C20DA 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 C20DA diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
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.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code C20DA 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 C20DA.

Fortunately, C20DA is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C20DA Trouble Code For Specific Cars

C20DA Austin Seven Aux A/C Blower Speed 2 Circuit Short to Ground
C20DA Daihatsu Rocky Glow Plug Circuit High Side, High Input
C20DA Talbot 105 Mirror Passenger Down Circuit Failure
C20DA Jaguar Kensington Seat Driver Forward Switch Circuit Short To Ground
C20DA Brutsch Mopetta Cruise Control Resume Signal Malfunction
C20DA Mercedes-benz G Class Air Suspension Disable Switch Circuit Short To Battery
C20DA Abarth Simca A/C pressure sensor circuit voltage low