Car Fault Codes
OBD-II trouble codes explained: meaning, causes, symptoms, fixes and typical repair cost.
Category
All
Fuel & air
Ignition & misfire
Emissions & exhaust
Cooling & lubrication
Speed & idle
Engine computer & electrical
Transmission
Hybrid & EV
Network
Body
Chassis & brakes
Showing 1–24 of 65 codes
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
U0019
Low Speed CAN Communication Bus
U0020
Low Speed CAN Communication Bus Performance
U0073
Control Module Communication Bus "A" Off
U0074
Control Module Communication Bus "B" Off
U0100
Lost Communication With ECM/PCM "A"
U0101
Lost Communication With Transmission Control Module (TCM)
U0102
Lost Communication With Transfer Case Control Module
U0103
Lost Communication With Gear Shift Control Module "A"
U0104
Lost Communication With Cruise Control Module
U0105
Lost Communication With Fuel Injector Control Module
U0106
Lost Communication With Glow Plug Control Module
U0107
Lost Communication With Throttle Actuator Control Module
U0108
Lost Communication With Alternative Fuel Control Module
U0109
Lost Communication With Fuel Pump Control Module