C0711 Diagnostic Trouble Code

C0711 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 C0711 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
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.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C0711 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 C0711.

Fortunately, C0711 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0711 Trouble Code For Specific Cars

C0711 Audi S3 Audio CD/DJ Internal Fault
C0711 Pininfarina Chronos Engine Speed Input Circuit Intermittent
C0711 Iveco Vertis Seat Direction Switch Assembly Circuit Short To Battery
C0711 Citroen 15 Fan Secondary Low With High Fan On
C0711 Hotchkiss 620 Ride Control LF Shock Actuator Circuit Open
C0711 Mazda 600 Transmission Transfer Case Contact Plate 'D' Circuit Failure
C0711 Saab 95 Ignition Start Circuit Short To Ground