P06E4 Diagnostic Trouble Code

P06E4 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 P06E4 diagnostic trouble code may include:

Faulty or damaged wiring
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
Poor fuel economy
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

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. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code P06E4 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 P06E4.

Fortunately, P06E4 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P06E4 Trouble Code For Specific Cars

P06E4 Fiat V8 Left Lamp Outage Signal Circuit Short to Ground
P06E4 Diva 10f IAC Monitor Disabled by PSP Switch Failed On
P06E4 Toyota Aa No Latch Signal Sensed on Closing and Door Reversed
P06E4 Dkw Reichklasse Ignition Coil - Cylinder 1 - Early Activation Fault
P06E4 Marcos Gt Transfer Case Neutral Indicator Hard Fault Present
P06E4 Fiat Strada Left Front Center Sensor Circuit Failure
P06E4 Hindustan Motors Trekker Pedal Correlation PDS1 and LPDS High