Generic OBD-II Diagnostic U - Network Codes
This list contains standard diagnostic trouble codes (DTC’s) that are used by some manufacturers to identify vehicle problems. The codes provide below are generic codes that may not apply to all vehicles. Vehicle manufacturers may use manufacturer specific DTC codes that are different from the codes shown below.
The list below is for information purposes only.
See also: Generic OBD-II P Powertrain Codes & Generic OBD-II B Body Codes
| Code | Description |
U0001 |
High Speed CAN Communication Bus |
U0002 |
High Speed CAN Communication Bus Performance |
U0003 |
High Speed CAN Communication Bus (+) Open |
U0004 |
High Speed CAN Communication Bus (+) Low |
U0005 |
High Speed CAN Communication Bus (+) High |
U0006 |
High Speed CAN Communication Bus (-) Open |
U0007 |
High Speed CAN Communication Bus (-) Low |
U0008 |
High Speed CAN Communication Bus (-) High |
U0009 |
High Speed CAN Communication Bus (-) shorted to Bus (+) |
U0010 |
Medium Speed CAN Communication Bus |
U0011 |
Medium Speed CAN Communication Bus Performance |
U0012 |
Medium Speed CAN Communication Bus (+) Open |
U0013 |
Medium Speed CAN Communication Bus (+) Low |
U0014 |
Medium Speed CAN Communication Bus (+) High |
U0015 |
Medium Speed CAN Communication Bus (-) Open |
U0016 |
Medium Speed CAN Communication Bus (-) Low |
U0017 |
Medium Speed CAN Communication Bus (-) High |
U0018 |
Medium Speed CAN Communication Bus (-) shorted to Bus (+) |
U0019 |
Low Speed CAN Communication Bus |
U0020 |
Low Speed CAN Communication Bus Performance |
U0021 |
Low Speed CAN Communication Bus (+) Open |
U0022 |
Low Speed CAN Communication Bus (+) Low |
U0023 |
Low Speed CAN Communication Bus (+) High |
U0024 |
Low Speed CAN Communication Bus (-) Open |
U0025 |
Low Speed CAN Communication Bus (-) Low |
U0026 |
Low Speed CAN Communication Bus (-) High |
U0027 |
Low Speed CAN Communication Bus (-) shorted to Bus (+) |
U0028 |
Vehicle Communication Bus A |
U0029 |
Vehicle Communication Bus A Performance |
U0030 |
Vehicle Communication Bus A (+) Open |
U0031 |
Vehicle Communication Bus A (+) Low |
U0032 |
Vehicle Communication Bus A (+) High |
U0033 |
Vehicle Communication Bus A (-) Open |
U0034 |
Vehicle Communication Bus A (-) Low |
U0035 |
Vehicle Communication Bus A (-) High |
U0036 |
Vehicle Communication Bus A (-) shorted to Bus A (+) |
U0037 |
Vehicle Communication Bus B |
U0038 |
Vehicle Communication Bus B Performance |
U0039 |
Vehicle Communication Bus B (+) Open |
U0040 |
Vehicle Communication Bus B (+) Low |
U0041 |
Vehicle Communication Bus B (+) High |
U0042 |
Vehicle Communication Bus B (-) Open |
U0043 |
Vehicle Communication Bus B (-) Low |
U0044 |
Vehicle Communication Bus B (-) High |
U0045 |
Vehicle Communication Bus B (-) shorted to Bus B (+) |
U0046 |
Vehicle Communication Bus C |
U0047 |
Vehicle Communication Bus C Performance |
U0048 |
Vehicle Communication Bus C (+) Open |
U0049 |
Vehicle Communication Bus C (+) Low |
U0050 |
Vehicle Communication Bus C (+) High |
U0051 |
Vehicle Communication Bus C (-) Open |
U0052 |
Vehicle Communication Bus C (-) Low |
U0053 |
Vehicle Communication Bus C (-) High |
U0054 |
Vehicle Communication Bus C (-) shorted to Bus C (+) |
U0055 |
Vehicle Communication Bus D |
U0056 |
Vehicle Communication Bus D Performance |
U0057 |
Vehicle Communication Bus D (+) Open |
U0058 |
Vehicle Communication Bus D (+) Low |
U0059 |
Vehicle Communication Bus D (+) High |
U0060 |
Vehicle Communication Bus D (-) Open |
U0061 |
Vehicle Communication Bus D (-) Low |
U0062 |
Vehicle Communication Bus D (-) High |
U0063 |
Vehicle Communication Bus D (-) shorted to Bus D (+) |
U0064 |
Vehicle Communication Bus E |
U0065 |
Vehicle Communication Bus E Performance |
U0066 |
Vehicle Communication Bus E (+) Open |
U0067 |
Vehicle Communication Bus E (+) Low |
U0068 |
Vehicle Communication Bus E (+) High |
U0069 |
Vehicle Communication Bus E (-) Open |
U0070 |
Vehicle Communication Bus E (-) Low |
U0071 |
Vehicle Communication Bus E (-) High |
U0072 |
Vehicle Communication Bus E (-) shorted to Bus E (+) |
U0073 |
Control Module Communication Bus Off |
U0074 |
Reserved by Document |
U0075 |
Reserved by Document |
U0076 |
Reserved by Document |
U0077 |
Reserved by Document |
U0078 |
Reserved by Document |
U0079 |
Reserved by Document |
U0080 |
Reserved by Document |
U0081 |
Reserved by Document |
U0082 |
Reserved by Document |
U0083 |
Reserved by Document |
U0084 |
Reserved by Document |
U0085 |
Reserved by Document |
U0086 |
Reserved by Document |
U0087 |
Reserved by Document |
U0088 |
Reserved by Document |
U0089 |
Reserved by Document |
U0090 |
Reserved by Document |
U0091 |
Reserved by Document |
U0092 |
Reserved by Document |
U0093 |
Reserved by Document |
U0094 |
Reserved by Document |
U0095 |
Reserved by Document |
U0096 |
Reserved by Document |
U0097 |
Reserved by Document |
U0098 |
Reserved by Document |
U0099 |
Reserved by Document |