P308E Diagnostic Trouble Code

P308E 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 P308E diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
An air leak forward of the DPF will change the sensor readings resulting in the code

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 you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code P308E 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 P308E.

Fortunately, P308E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P308E Trouble Code For Specific Cars

P308E Rover 3500 Ignition Coil A Primary Circuit Malfunction
P308E Armstrong Siddeley Special Air Suspension Rear Height Sensor High (SE) Signal Circuit Short To Ground
P308E Tvr Grantura Power Door Memory Lock Relay Circuit Short To Ground
P308E Hrg 1.5 Litre Ride Control LR Shock Actuator Circuit Short To Battery
P308E Holden Hb Power Door Memory Lock Relay Circuit Failure
P308E Citroen Ln
P308E Jaguar Xj-s Seat Driver Occupied Switch Circuit Failure