U0318 Diagnostic Trouble Code

U0318 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 U0318 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
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 for damage to the tank indicating impact that may have damaged the fuel pump or sender. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code U0318 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 U0318.

Fortunately, U0318 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0318 Trouble Code For Specific Cars

U0318 Holden Clubsport Pedal Position Sensor B Circuit Intermittent
U0318 Mercedes-benz Slr Class Air Suspension Front Inflator Solenoid Output Circuit Short To Ground
U0318 Zaz 966 SCP (J1850) Invalid or Missing Data for Vehicle Speed
U0318 Chevrolet Celebrity Driver Power Window One Touch Window Relay Circuit Short To Ground
U0318 Dodge Nitro Ignition Run Circuit Open
U0318 Cunningham C3 Fuel Temperature Sensor #1 Circuit Open
U0318 Mercedes-benz Vaneo Air Suspension Height Sensor Power Circuit Failure