P2318 Diagnostic Trouble Code

P2318 is a kind of OBD-II Diagnostic P-Powertrain 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 P2318 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
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
An air leak forward of the DPF will change the sensor readings resulting in the code

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. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code P2318 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 P2318.

Fortunately, P2318 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2318 Trouble Code For Specific Cars

P2318 Volkswagen Gol Ii Ride Control LR Shock Actuator Circuit Short To Battery
P2318 Fiat 3 Lamp ABS Warning Output Circuit Short To Ground
P2318 Dodge Grand Caravan Ignition Coil Secondary Circuit Failure
P2318 Fiat 508 Lamp Backup Switch Input Circuit Short To Battery
P2318 Alpine A442 Air Bag Passenger Circuit Resistance Low or Shorted Together
P2318 Bmw Z8 Column Tilt Feedback Potentiometer Circuit Short to Ground
P2318 Hyundai I30 SCP (J1850) Invalid or Missing Data for Cellular Phone / Paging System