C0115 Diagnostic Trouble Code

C0115 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 C0115 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. 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. 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 C0115 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 C0115.

Fortunately, C0115 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0115 Trouble Code For Specific Cars

C0115 Fiat X1 Left Rear Backup Lamp Circuit Failure
C0115 Toyota Mr2 Output Speed Sensor Circuit Malfunction
C0115 Citroen Gsx Fuel Pressure Regulator 1 Control Circuit High
C0115 Peugeot 202 ECM Control Relay O/P Circuit Malfunction
C0115 Mg Rv11 Air Temperature External Sensor Circuit Short To Ground
C0115 Bmw Hamann Climate Control Water Temperature Sensor Circuit Failure
C0115 Willys-overland Rural