C0717 Diagnostic Trouble Code

C0717 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 C0717 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
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.
Dirty air cleaner element Damaged DPF

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. 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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code C0717 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 C0717.

Fortunately, C0717 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0717 Trouble Code For Specific Cars

C0717 Volkswagen Quantum RPM Input Circuit Failure
C0717 Lamborghini Jalpa Signal Link Fault (Non SCP)
C0717 Fairthorpe Mk Injector Circuit Malfunction - Cylinder 5
C0717 Osca 2000 Door Passenger Set Switch Stuck Failure
C0717 Maserati Ghibli Transmission Fluid Pressure Sensor/Switch D Circuit High
C0717 Mg Rv12 Air Temperature Internal Sensor Circuit Failure
C0717 Fiat Grand Break Lamp Tail Output Circuit Short To Battery