P042D Diagnostic Trouble Code

P042D 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 P042D diagnostic trouble code may include:

The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Faulty or damaged wiring
Hesitation upon acceleration
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Defective ECU strategies or components will prevent proper regeneration

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 P042D 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 P042D.

Fortunately, P042D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P042D Trouble Code For Specific Cars

P042D Holden Maloo Power Supply #1 Circuit Short to Ground
P042D Ducati Monster 797 Illuminated Entry Input Short Circuit To Battery
P042D Saturn L Immobilizer Code Word/ID Number Write Failure
P042D Lancia Stratos Stability Control Inhibit Warning
P042D Ferrari F1 Intermediate Shaft Speed Sensor Circuit
P042D Alfa Romeo 8c Accelerometer Rear Circuit Failure
P042D Hansa 1100 Passenger Solar Radiation Sensor Circuit Open