C2011 Diagnostic Trouble Code

C2011 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 C2011 diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
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
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
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. 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 C2011 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 C2011.

Fortunately, C2011 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2011 Trouble Code For Specific Cars

C2011 Mercedes B Class ABS Hydraulic Pump Motor Circuit Open
C2011 Wanderer 5
C2011 Chevrolet Fb Driver's Seatbelt Tension Reducer Circuit Short to Ground
C2011 Chery A3 Double Lock Feedback Failure
C2011 Nissan Santana Crankshaft Position Sensor B Circuit Range/Performance
C2011 Singer 8 Internal ECM Malfunction
C2011 Amc Hornet Air Suspension Front Inflator Solenoid Output Circuit Short To Battery