P142D Diagnostic Trouble Code

P142D 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 P142D diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code P142D 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 P142D.

Fortunately, P142D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P142D Trouble Code For Specific Cars

P142D Datsun Pulsar HO2S Heater Control Circuit (Bank 2 Sensor 3)
P142D Opel Crossland X Digital TRS Failed to Transition States in KOEO / KOER
P142D Peugeot 505 EIC Switch-2 Assembly Circuit Short To Battery
P142D Daihatsu Domino Gear Shift Position Circuit Intermittent
P142D Voisin C Random/Multiple Cylinder Misfire Detected
P142D Dodge Copperhead Ignition Coil F Primary/Secondary Circuit Malfunction
P142D Bmw 325 Central Lock Motor Failure