P239F Diagnostic Trouble Code

P239F 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 P239F diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
Hesitation upon acceleration

Possible Causes :

A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.
Dirty air cleaner element Damaged DPF
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P239F 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 P239F.

Fortunately, P239F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P239F Trouble Code For Specific Cars

P239F Mercedes E 270 ABS Power Relay Output Open Circuit
P239F Volvo Xc70 I SCP (J1850) Invalid or Missing Data for Function Read Audible Warnings / Anti-Theft Module, Vehicle Immobilized
P239F Batten 3.6 B Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
P239F Holden Xu Pressure Control Solenoid "C" Open Circuit
P239F Mg Xpower Ambient Air Temperature Sensor Circuit High
P239F Subaru H6 Left Rear Backup Lamp Circuit Short to Battery
P239F Nissan Sedan Cruise Control Coast Signal Malfunction