P239C Diagnostic Trouble Code

P239C 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 P239C diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
Diminished fuel efficiency

Possible Causes :

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.
Defective ECU strategies or components will prevent proper regeneration
Faulty IMRC actuator relay (if equipped)

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 P239C 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 P239C.

Fortunately, P239C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P239C Trouble Code For Specific Cars

P239C Fiat Mobi Lamp Turn Signal Left Circuit Short To Battery
P239C Alfa Romeo 175 ABS Power Relay Coil Short Circuit To Ground
P239C Holden Drover Pedal Position Sensor Disagreement btwn Sensors
P239C Hillman 40 Passenger's Seat Recline Back Switch Circuit Short to Battery
P239C Bentley 3.5-litre Battery Heater Circuit Failure
P239C Mercedes-benz Ck Class Air Mixture Solenoid Circuit Malfunction
P239C Ford Popular Mirror Passenger Horizontal Feedback Potentiometer Circuit Failure