U2796 Diagnostic Trouble Code

U2796 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 U2796 diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Faulty IMRC actuator/sensor

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 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 U2796 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 U2796.

Fortunately, U2796 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2796 Trouble Code For Specific Cars

U2796 Buick 70 Cylinder 4 Injector Circuit Low
U2796 Ferrari 166 Injector Control Pressure Sensor Above / Below Desired
U2796 Honda Ridgeline Rear Sounder Circuit Short to Vbatt
U2796 Lada 1300 Shift Malfunction
U2796 Healey Alvis Passenger Solar Radiation Sensor Circuit Short to Ground
U2796 Honda Acura Rl Pressure Control Solenoid B Performance
U2796 Nissan Mm Compressor Failure