U0116 Diagnostic Trouble Code

U0116 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 U0116 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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. 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 U0116 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 U0116.

Fortunately, U0116 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0116 Trouble Code For Specific Cars

U0116 Jensen Jensen-healey Seat Driver Recline Rearward Switch Circuit Open
U0116 Simca 2 Litres Intake Valve Control Solenoid Circuit Low (Bank 1)
U0116 Flint 6-55 Left Rear Sensor Circuit Short to Vbat
U0116 Brutsch Zwerg Cruise Control/Brake Switch A Circuit Low
U0116 Dacia Logan Ii Fuel Temperature Sensor A Circuit Malfunction
U0116 Ford Artic LF PARK LAMP OUTPUT CIRCUIT Short to Battery
U0116 Jensen Healey Seat Driver Recline Motor Stalled