P142F Diagnostic Trouble Code

P142F 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 P142F 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code P142F 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 P142F.

Fortunately, P142F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P142F Trouble Code For Specific Cars

P142F Nissan Liberta Villa Column Reach Motor Stalled
P142F Renault Symbol HO2S Heater Control Circuit (Bank 1 Sensor 3)
P142F Ram 2500 Fuel Temperature Sensor B Circuit High Input
P142F Dodge Challenger Ignition Coil C Secondary Circuit Malfunction
P142F Talbot Sunbeam Mirror Passenger Right Circuit Failure
P142F Martin Aero Transmission 4-Wheel Drive Mode Select Open Circuit
P142F Italdesign Nazca