C2515 Diagnostic Trouble Code

C2515 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 C2515 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
Rich or lean exhaust

Possible Causes :

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

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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C2515 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 C2515.

Fortunately, C2515 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2515 Trouble Code For Specific Cars

C2515 Vauxhall Monaro Pressure Control Solenoid B Intermittent
C2515 Volvo 142
C2515 Bertone Stratos Brake Pedal Input Circuit Failure
C2515 Frazer Nash Colmore No Communication With Traffic MasterModule
C2515 Alfa Romeo 4c Accelerometer Front Circuit Failure
C2515 Apollo Gt Air Suspension LF Height Sensor Circuit Short To Ground
C2515 Mercedes 35 Hp A/C Water Pump Detection Circuit Failure