P0942 Diagnostic Trouble Code

P0942 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 P0942 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
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

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
Dirty air cleaner element Damaged DPF

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P0942 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 P0942.

Fortunately, P0942 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0942 Trouble Code For Specific Cars

P0942 Ferrari F310 Intermediate Shaft Speed Sensor Circuit No signal
P0942 Ferrari 125 Injector Circuit Open / Shorted - Cylinder #5
P0942 Isdera 033 SCP (J1850) Invalid or Missing Data for Odometer
P0942 Chrysler Grand Voyager Evaporative Emission Control System Incorrect Purge flow
P0942 Renault Captur 2 Gear Shift Lock Solenoid Circuit High
P0942 Steyr G-series Lamp Tail Output Circuit Short To Battery
P0942 Gmc Canyon Park Brake Actuator Assembly Switch Applied Circuit Short to Gnd