U0308 Diagnostic Trouble Code

U0308 is a kind of OBD-II Diagnostic U-Network 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 U0308 diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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.

Process Tips

Diagnostic trouble code U0308 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 U0308.

Fortunately, U0308 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0308 Trouble Code For Specific Cars

U0308 Franklin 11 Needle Lift Sensor Malfunction
U0308 Ac 15 A/C Refrigerant Temperature Circuit Range/Performance
U0308 Amc Eagle Air Suspension Front Height Sensor High (SE) Signal Circuit Short To Ground
U0308 Ford S-max Mirror Passenger Right Circuit Short To Ground
U0308 Allard J2 Air Bag Diagnostic Monitor Ground Circuit Short To Battery
U0308 Mercedes C Class ABS Inlet Valve Coil Rear Circuit Open
U0308 Venturi Atlantique Pump Speed Signal Fault