U2889 Diagnostic Trouble Code

U2889 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 U2889 diagnostic trouble code may include:

Faulty or damaged wiring
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Poor fuel economy
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
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 :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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.

Process Tips

Diagnostic trouble code U2889 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 U2889.

Fortunately, U2889 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2889 Trouble Code For Specific Cars

U2889 Vauxhall Mokka Pressure Control Solenoid B Electrical
U2889 Mazda Levante Turbo Charger Bypass Valve Control Circuit High
U2889 Mitsubishi Delica Audio Tape Deck Mechanism Fault
U2889 Saab 9-7 Ignition Tach Circuit Open
U2889 Mercedes Cl 500 ABS Inlet Valve Coil RF Circuit Failure
U2889 Chrysler Java Evaporative Emission Control System Pressure Sensor High Input
U2889 Nissan Violet Cylinder #6 High To Low Side Open