P1E7E Diagnostic Trouble Code

P1E7E 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 P1E7E 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 :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code P1E7E 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 P1E7E.

Fortunately, P1E7E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1E7E Trouble Code For Specific Cars

P1E7E Frazer Nash Sebring NVM Alarm Data Failure
P1E7E Mazda Rustler 4X4 Switch Out of Self Test Range
P1E7E Chenard Walcker Straight-eight Door Unlock Disarm Switch Circuit Failure
P1E7E Mercedes E 290 ABS Power Relay Output Short Circuit To Ground
P1E7E Prince Skyline Fuel Rail Pressure Sensor Circuit Range/Performance
P1E7E Oldsmobile Six Damper LF Circuit Short To Battery
P1E7E Mazda Kabura Turbo Boost Pressure Not Detected