U0118 Diagnostic Trouble Code

U0118 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 U0118 diagnostic trouble code may include:

If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Corroded or damaged connector
Reduction in engine performance, especially at low RPM levels
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.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code U0118 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 U0118.

Fortunately, U0118 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0118 Trouble Code For Specific Cars

U0118 Volkswagen Ea RF LAMP LOW BEAM CIRCUIT Short to Battery
U0118 Lloyd 300 Throttle/Pedal Position Sensor/Switch C Circuit Intermittent
U0118 Mercedes Sl 350 Air Bag Crash Sensor #2 Feed/Return Circuit Failure
U0118 Bmw-isetta Motocoupe Compass Module is not Responding
U0118 Lincoln Mkr Throttle position sensor out of range
U0118 Chevrolet Silverado 3 ELC System Closure Valve Flow Fault
U0118 Ssangyong Korando LAMP DOME OUTPUT Circuit Short to Ground