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 Toyota Caldina O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)
P301E Wills Sainte Claire W SCP (J1850) Invalid or Missing Data for Odometer
P301E Weber Sportscars F1 SCP (J1850) Invalid or Missing Data for Mirrors
P301E Riley Pathfinder Hydraulic Clutch Actuator Valve Signal Fault
P301E Toyota Celsior O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P301E Chiribiri Chiribiri Engine Coolant Temperature Signal Missing/Fault
P301E Ford Vendome Module is Not Responding (Non SCP)