U0276 Diagnostic Trouble Code

U0276 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 U0276 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code U0276 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 U0276.

Fortunately, U0276 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0276 Trouble Code For Specific Cars

U0276 Alfa Romeo Graduate Air Assisted Injector Control Circuit High
U0276 Lincoln Cosmopolitan Throttle Position Sensor B Out Of Self Test Range
U0276 Peugeot Touareg Engine Oil Pressure Sensor/Switch Range/Performance
U0276 Volkswagen California Reverse Engagement Error
U0276 Bristol 406 COURTESY LAMP OUTPUT Failure
U0276 Piontek Sport-tech Evaporative Emission (EVAP) System Flow During Non-Purge Oldsmobile Only
U0276 Mercedes-benz Ck Class Air Mixture Solenoid Circuit Malfunction