OBD-II Diagnostic Trouble Codes Database

Over 20K+ codes with detailed explanations, symptoms, causes, and repair solutions. Fast search, free access, and professional-grade information for mechanics and car enthusiasts.

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Important Notice

OBD-II diagnostic codes can vary by vehicle manufacturer, model year, and specific configuration. While P-codes (powertrain) follow SAE J2012 standards, U-codes (network communication) and manufacturer-specific interpretations may differ. Always consult your vehicle's service manual or a qualified technician for accurate diagnosis.

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Search Results for "U00" (U-codes, 20 found)

20 results
UU0000 — ISO/SAE Reserved
INFO👁 12
UU0001 — Code not defined yet
👁 16
UU0002 — High Speed CAN Communication Bus Performance
HIGH👁 11
UU0003 — High Speed CAN Communication Bus (+) Open
HIGH👁 12
UU0004 — High Speed CAN Communication Bus (+) Low
HIGH👁 12
UU0005 — High Speed CAN Communication Bus (+) High
HIGH👁 11
UU0006 — High Speed CAN Communication Bus (-) Open
HIGH👁 12
UU0007 — High Speed CAN Communication Bus (-) Low
HIGH👁 8
UU0008 — High Speed CAN Communication Bus (-) High
HIGH👁 13
UU0009 — High Speed CAN Communication Bus (-) shorted to Bus (+)
HIGH👁 11
UU000A — Code not defined yet
INFO👁 8
UU000B — Code not defined yet
INFO👁 7
UU000C — Code not defined yet
INFO👁 8
UU000D — Code not defined yet
INFO👁 12
UU000E — Code not defined yet
INFO👁 11
UU000F — Code not defined yet
INFO👁 12
UU0010 — Medium Speed CAN Communication Bus
MEDIUM👁 12
UU0011 — Medium Speed CAN Communication Bus Performance
MEDIUM👁 12
UU0012 — Medium Speed CAN Communication Bus (+) Open
MEDIUM👁 13
UU0013 — Medium Speed CAN Communication Bus (+) Low
MEDIUM👁 8
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