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 Buick 90 Cylinder 5 Contribution/Balance Fault
P239C Zundapp Janus Seat Belt Switch Circuit Short To Ground
P239C Hyundai Starex SCP (J1850) Invalid or Missing Data for Electric Traction Drive (Inverter)
P239C Chevrolet Niva EGR Calibration High
P239C Ktm Duke Servo Motor Potentiometer Defrost Circuit Failure
P239C Diva 10f IAC Monitor Disabled by PSP Switch Failed On
P239C Mcc Fortwo A/C Refrigerant pressure Sensor Circuit High Input