U0097Vehicle Communication Bus H (-) Open
- Generic OBD-II code · Network
- How the car detects it
- U0097 points to an open (-) wire on Vehicle Communication Bus H, CAN-Low if Bus H is a CAN. The code is absent from public manufacturer documents. Effects vary: NXP's fault-tolerant TJA1055 keeps receiving differentially with a broken CANL, while on a high-speed CAN the nodes beyond the break lose part of their signal. Sleep behaviour matters too; NXP designed the wake detection of its TJA1043 so that a broken CAN-Low does not wake the network while it is going to sleep. A car with U0097 should still be checked for battery drain. To locate the break, Nissan advises splitting a harness with inline connectors into sections, testing one at a time and fitting a 120-ohm resistor in place of the terminating module.
- What you may notice
- Modules beyond the break respond only sometimes
- Code with little effect on fault-tolerant layouts
- Likely causes
- LikelyBroken (-) wire in the harness
- PossibleSpread or bent terminal losing contact
- RarePoor earlier repair or splice in the (-) wire
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.