U0092Vehicle Communication Bus H
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- U0092 stands for Vehicle Communication Bus H as a whole, the eighth network letter in SAE's list. Which network a carmaker files under H is not stated in any public bulletin or OBD table, and no manufacturer documents U0092 itself; the service data of the specific model has to tell. The code reflects CARB's rule that a digital input which stops communicating must be detected and get its own fault code. U0092 does not narrow the fault down; U0093 stands for degraded traffic, U0094 to U009A for single-wire faults and U007A for a module that went bus off. Supply problems can look the same: Nissan observes that below about 10 V modules drop off the bus one by one at different voltages, and that a few main fuses feed many modules at once. Check battery and feeds first.
- What you may notice
- Several functions handled by Bus H modules fail together
- Problems worse at cranking or with a low battery
- Likely causes
- LikelyWiring or connector fault on Bus H
- PossibleWeak battery or voltage drop so modules fall off the bus
- PossibleBlown main fuse or bad feed supplying several Bus H modules
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.