U2906 Diagnostic Trouble Code

U2906 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 U2906 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code U2906 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 U2906.

Fortunately, U2906 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2906 Trouble Code For Specific Cars

U2906 Jeep Cj Seat Driver Rear Down Switch Circuit Open
U2906 Stutz Dv32 Lamp Warning Relay Circuit Short To Ground
U2906 Oldsmobile Curved Dash Cylinder 7 Injector Circuit Low
U2906 Oldsmobile Incas Cylinder 9 Misfire Detected
U2906 Proton Wira Fuel Temperature Sensor #1 Circuit Open
U2906 Mercedes Gle Class Accelerometer Rear Circuit Signal Is Not Sensed
U2906 Chrysler Esx Evap Emission Control Sys Vent Control Valve Circuit