C0118 Diagnostic Trouble Code

C0118 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 C0118 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C0118 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 C0118.

Fortunately, C0118 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0118 Trouble Code For Specific Cars

C0118 Ferrari 288 Input-shaft-speed input circuit failure
C0118 Nissan March Column Tilt Motor Stalled
C0118 Mercury Grand Air Suspension LR Corner Down Timeout
C0118 Nissan Qx Crankshaft Position Sensor A Circuit Intermittent
C0118 Riley 2.5 Hood Switch Circuit Short To Battery
C0118 Marcos Mantara Transmission 4-Wheel Drive Clutch Relay Circuit Failure
C0118 Mercedes-benz Mcc Air Suspension Front Compressor Relay Circuit Short To Battery