P301E Diagnostic Trouble Code

P301E 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 P301E diagnostic trouble code may include:

Carbon Buildup on O2 Sensor
Malfunction Indicator Lamp (MIL) illuminated
Hesitation upon acceleration
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Some aftermarket accessories and performance modifications

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. 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 P301E 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 P301E.

Fortunately, P301E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P301E Trouble Code For Specific Cars

P301E Ssangyong Rexton Lamp Headlamp High-Beam Circuit Short To Battery
P301E Humber Super Right Rear Turn Lamp Circuit Failure
P301E Daewoo Brougham Fuel Trim Malfunction (Bank 2)
P301E Daihatsu U4b GPS Receiver Error
P301E Packard Carribean Drive Switch Input Circuit High
P301E Renault 18 Gear 3 Incorrect ratio
P301E Pontiac Vibe Front Doppler Sensor Circuit Failure