U0092 code meaning
Vehicle Communication Bus H
What U0092 means
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.
U0092 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0092
- Several functions handled by Bus H modules fail together
- Problems worse at cranking or with a low battery
Common causes of U0092
- Most 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
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Bus h wiringModule connector
What each part of U0092 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 92 | The exact fault in that area. |
What to do next
- Note U0092 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0092
What does U0092 mean?
U0092 means "Vehicle Communication Bus H". U0092 stands for Vehicle Communication Bus H as a whole, the eighth network letter in SAE's list. It is a generic code, so it means the same on every make.
Is it safe to drive with U0092?
Drive gently and only to a workshop. With U0092 the car can go into limp mode (reduced power) to protect itself.
Will U0092 fail an emissions test?
U0092 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0092 to fix?
Difficulty: hard. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will U0092 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.