Fault codes U0000–U0099
Under SAE J2012, U00xx codes cover network electrical. Our list has 47 codes in this range. With most of them you can drive gently, but get the car checked soon. Repair prices are listed per cause, depending on make and model. The most common are U0001, U0002, U0003. Based on AI combined with our hands-on workshop experience and knowledge.
Most common in this range
U0001High-speed CAN bus: faultU0002High-speed CAN bus: performance faultU0003High-speed CAN bus: (+) wire openU0004High-speed CAN bus: (+) voltage lowU0005High-speed CAN bus: (+) voltage highU0006High-speed CAN bus: (−) wire openU0007High-speed CAN bus: (−) voltage lowU0008High-speed CAN bus: (−) voltage high
All codes in this range
U0001High-speed CAN bus: faultU0002High-speed CAN bus: performance faultU0003High-speed CAN bus: (+) wire openU0004High-speed CAN bus: (+) voltage lowU0005High-speed CAN bus: (+) voltage highU0006High-speed CAN bus: (−) wire openU0007High-speed CAN bus: (−) voltage lowU0008High-speed CAN bus: (−) voltage highU0009High-speed CAN bus: wires shorted togetherU0010Medium-speed CAN bus: faultU0011Medium-speed CAN bus: performance faultU0012Medium-speed CAN bus: (+) wire openU0013Medium-speed CAN bus: (+) voltage lowU0014Medium-speed CAN bus: (+) voltage highU0015Medium-speed CAN bus: (−) wire openU0016Medium-speed CAN bus: (−) voltage lowU0017Medium-speed CAN bus: (−) voltage highU0018Medium-speed CAN bus: wires shorted togetherU0019Low-speed CAN bus: faultU0020Low-speed CAN bus: performance faultU0021Low-speed CAN bus: (+) wire openU0022Low-speed CAN bus: (+) voltage lowU0023Low-speed CAN bus: (+) voltage highU0024Low-speed CAN bus: (−) wire openU0025Low-speed CAN bus: (−) voltage lowU0026Low-speed CAN bus: (−) voltage highU0027Low-speed CAN bus: wires shorted togetherU0028Data bus A: faultU0029Data bus A: performance faultU0030Data bus A: (+) wire openU0031Data bus A: (+) voltage lowU0032Data bus A: (+) voltage highU0033Data bus A: (−) wire openU0034Data bus A: (−) voltage lowU0035Data bus A: (−) voltage highU0036Data bus A: wires shorted togetherU0037Data bus B: faultU0038Data bus B: performance faultU0039Data bus B: (+) wire openU0040Data bus B: (+) voltage lowU0041Data bus B: (+) voltage highU0042Data bus B: (−) wire openU0043Data bus B: (−) voltage lowU0044Data bus B: (−) voltage highU0045Data bus B: wires shorted togetherU0073Data bus A switched off (bus off)U0074Data bus B switched off (bus off)
Want a definite answer?
Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.