C3111 Diagnostic Trouble Code

C3111 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 C3111 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
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
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 :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code C3111 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 C3111.

Fortunately, C3111 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3111 Trouble Code For Specific Cars

C3111 Caterham Superseven Door Handle Right Front Short To Ground
C3111 Suzuki Kizashi Mirror Driver Down Short To Ground
C3111 Volkswagen Parati Right Rear Sensor Circuit Fault
C3111 Porsche 935 Fuel Level Input Circuit Low
C3111 Chevrolet Comodoro Driver Sid, Side mount Airbag Circuit Short to Ground
C3111 Peugeot 604 ELC System Closure Valve Flow Fault
C3111 Aston Martin Ulster Air Suspension Vent Solenoid Output Circuit Short To Ground