OBD-II code · Network
U0096 Vehicle Communication Bus H (+) High
Bus H high-side line voltage above expected range. A communication loss with this module breaks any function relying on its data — diagnostic tools may show 'no response' and dependent modules can fall into limp mode.
Is it safe to drive with U0096?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWire shorted to battery
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Bus H Wiring
Related codes
- U0032Vehicle Communication Bus A (+) High
- U0041Vehicle Communication Bus B (+) High
- U0059Vehicle Communication Bus D (+) High
- U0068Vehicle Communication Bus E (+) High
- U0080Vehicle Communication Bus B (+) High
- U008DVehicle Communication Bus G (+) High
- U0093Vehicle Communication Bus H Performance
- U0094Vehicle Communication Bus H (+) Open
- U0095Vehicle Communication Bus H (+) Low
- U0097Vehicle Communication Bus H (-) Open
- U0098Vehicle Communication Bus H (-) Low
- U0099Vehicle Communication Bus H (-) High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.