U0008 Diagnostic Trouble Code

U0008 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 U0008 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
Dirty air cleaner element Damaged DPF

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. Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. 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.

Process Tips

Diagnostic trouble code U0008 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 U0008.

Fortunately, U0008 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0008 Trouble Code For Specific Cars

U0008 Nissan Primastar Crankshaft Position Camshaft Position Correlation (Bank 1 Sensor A)
U0008 Abarth 750 A Camshaft Position - Timing Over-Retarded (Bank 1)
U0008 Italdesign Buron SCP (J1850) Invalid or Missing Data for Window Wiper / Washer
U0008 Chevrolet Suburban Electronic Feedback Signal Not Detected
U0008 Seat Alhambra Injector Circuit Malfunction - Cylinder 7
U0008 Mitsubishi Delica Audio Tape Deck Mechanism Fault
U0008 Mazda Protege 3-4 Shift Malfunction