THE CODE DIRECTORY
Diagnostic code references — Page 107.
Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.
Generic OBD-II
U0043
Vehicle Communication Bus B (-) Low
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Generic OBD-II
U0044
Vehicle Communication Bus B (-) High
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Generic OBD-II
U0045
Vehicle Communication Bus B (-) shorted to Bus B (+)
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Generic OBD-II
U0046
Vehicle Communication Bus C
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Generic OBD-II
U0047
Vehicle Communication Bus C Performance
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Generic OBD-II
U0048
Vehicle Communication Bus C (+) Open
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Generic OBD-II
U0049
Vehicle Communication Bus C (+) Low
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Generic OBD-II
U0050
Vehicle Communication Bus C (+) High
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Generic OBD-II
U0051
Vehicle Communication Bus C (-) Open
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Generic OBD-II
U0052
Vehicle Communication Bus C (-) Low
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Generic OBD-II
U0053
Vehicle Communication Bus C (-) High
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Generic OBD-II
U0054
Vehicle Communication Bus C (-) shorted to Bus C (+)
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Generic OBD-II
U0055
Vehicle Communication Bus D
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Generic OBD-II
U0056
Vehicle Communication Bus D Performance
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Generic OBD-II
U0057
Vehicle Communication Bus D (+) Open
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Generic OBD-II
U0058
Vehicle Communication Bus D (+) Low
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Generic OBD-II
U0059
Vehicle Communication Bus D (+) High
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Generic OBD-II
U0060
Vehicle Communication Bus D (-) Open
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Generic OBD-II
U0061
Vehicle Communication Bus D (-) Low
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Generic OBD-II
U0062
Vehicle Communication Bus D (-) High
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Generic OBD-II
U0063
Vehicle Communication Bus D (-) shorted to Bus D (+)
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Generic OBD-II
U0064
Vehicle Communication Bus E
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Generic OBD-II
U0065
Vehicle Communication Bus E Performance
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Generic OBD-II
U0066
Vehicle Communication Bus E (+) Open
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Generic OBD-II
U0067
Vehicle Communication Bus E (+) Low
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Generic OBD-II
U0068
Vehicle Communication Bus E (+) High
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Generic OBD-II
U0069
Vehicle Communication Bus E (-) Open
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Generic OBD-II
U0070
Vehicle Communication Bus E (-) Low
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Generic OBD-II
U0071
Vehicle Communication Bus E (-) High
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Generic OBD-II
U0072
Vehicle Communication Bus E (-) shorted to Bus E (+)
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Generic OBD-II
U0073
Control Module Communication Bus A Off
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Generic OBD-II
U0074
Control Module Communication Bus B Off
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Generic OBD-II
U0075
Control Module Communication Bus C Off
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Generic OBD-II
U0076
Control Module Communication Bus D Off
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Generic OBD-II
U0077
Control Module Communication Bus E Off
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Generic OBD-II
U0078
Control Module Communication Bus F Off
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Generic OBD-II
U0079
Control Module Communication Bus G Off
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Generic OBD-II
U007A
Control Module Communication Bus H Off
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Generic OBD-II
U007B
Control Module Communication Bus I Off
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Generic OBD-II
U007C
Control Module Communication Bus J Off
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Generic OBD-II
U007D
Control Module Communication Bus K Off
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Generic OBD-II
U007E
Control Module Communication Bus L Off
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Generic OBD-II
U007F
Control Module Communication Bus M Off
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Generic OBD-II
U0080
Vehicle Communication Bus F
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Generic OBD-II
U0081
Vehicle Communication Bus F Performance
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Generic OBD-II
U0082
Vehicle Communication Bus F + Open
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Generic OBD-II
U0083
Vehicle Communication Bus F + Low
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Generic OBD-II
U0084
Vehicle Communication Bus F + High
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Generic OBD-II
U0085
Vehicle Communication Bus F - Open
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Generic OBD-II
U0086
Vehicle Communication Bus F - Low
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Generic OBD-II
U0087
Vehicle Communication Bus F - High
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Generic OBD-II
U0088
Vehicle Communication Bus F - Shorted to Bus F +
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Generic OBD-II
U0089
Vehicle Communication Bus G
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Generic OBD-II
U008A
Vehicle Communication Bus G Performance
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Generic OBD-II
U008B
Vehicle Communication Bus G (+) Open
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Generic OBD-II
U008C
Vehicle Communication Bus G (+) Low
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Generic OBD-II
U008D
Vehicle Communication Bus G (+) High
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Generic OBD-II
U008E
Vehicle Communication Bus G (-) Open
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Generic OBD-II
U008F
Vehicle Communication Bus G (-) Low
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Generic OBD-II
U0090
Vehicle Communication Bus G (-) High
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Generic OBD-II
U0091
Vehicle Communication Bus G (-) shorted to Bus G (+)
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Generic OBD-II
U0092
Vehicle Communication Bus H
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Generic OBD-II
U0093
Vehicle Communication Bus H Performance
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Generic OBD-II
U0094
Vehicle Communication Bus H (+) Open
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Generic OBD-II
U0095
Vehicle Communication Bus H (+) Low
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Generic OBD-II
U0096
Vehicle Communication Bus H (+) High
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Generic OBD-II
U0097
Vehicle Communication Bus H (-) Open
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Generic OBD-II
U0098
Vehicle Communication Bus H (-) Low
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Generic OBD-II
U0099
Vehicle Communication Bus H (-) High
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Generic OBD-II
U009A
Vehicle Communication Bus H (-) shorted to Bus H (+)
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Generic OBD-II
U009B
Vehicle Communication Bus I
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Generic OBD-II
U009C
Vehicle Communication Bus I Performance
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Generic OBD-II
U009D
Vehicle Communication Bus J
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Generic OBD-II
U009E
Vehicle Communication Bus J Performance
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Generic OBD-II
U0100
Lost Communication With ECM/PCM A
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Generic OBD-II
U0101
Lost Communication With TCM
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Generic OBD-II
U0102
Lost Communication With Transfer Case Control Module
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Generic OBD-II
U0103
Lost Communication With Gear Shift Control Module A
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Generic OBD-II
U0104
Lost Communication With Cruise Control Module
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Generic OBD-II
U0105
Lost Communication With Fuel Injector Control Module
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Generic OBD-II
U0106
Lost Communication With Glow Plug Control Module 1
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Generic OBD-II
U0107
Lost Communication With Throttle Actuator A Control Module
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Generic OBD-II
U0108
Lost Communication With Alternative Fuel Control Module
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Generic OBD-II
U0109
Lost Communication With Fuel Pump Control Module A
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Generic OBD-II
U010A
Lost Communication With Exhaust Gas Recirculation Control Module A
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Generic OBD-II
U010B
Lost Communication With Exhaust Gas Recirculation Control Module B
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Generic OBD-II
U010C
Lost Communication With Turbocharger/Supercharger Control Module A
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Generic OBD-II
U010D
Lost Communication With Turbocharger/Supercharger Control Module B
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Generic OBD-II
U010E
Lost Communication With Reductant Control Module
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Generic OBD-II
U010F
Lost Communication With Air Conditioning Control Module
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Generic OBD-II
U0110
Lost Communication With Drive Motor Control Module A
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Generic OBD-II
U0111
Lost Communication With Battery Energy Control Module A
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Generic OBD-II
U0112
Lost Communication With Battery Energy Control Module B
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Generic OBD-II
U0113
Lost Communication With Emissions Critical Control Information
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Generic OBD-II
U0114
Lost Communication With Four-Wheel Drive Clutch Control Module
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Generic OBD-II
U0115
Lost Communication With ECM/PCM B
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Generic OBD-II
U0116
Lost Communication With Coolant Temperature Control Module
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Generic OBD-II
U0117
Lost Communication With PTO Control Module
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Generic OBD-II
U0118
Lost Communication With Fuel Additive Control Module
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Generic OBD-II
U0119
Lost Communication With Fuel Cell Control Module
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These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.