U0092 reports a fault on the bus that the module cannot narrow down to a single line or condition on vehicle communication bus H. SAE J2012 gives each vehicle bus a block of codes: the bus itself, performance, then open, low and high for the (+) and the (-) line and a short between them; which physical network carries which letter is set by the manufacturer. Modules on the affected bus may stop exchanging data, so lost-communication codes and warning lights in several systems usually appear together.
Medium severity. Can I keep driving?It depends on which control module has dropped out. If it affects the engine, brakes, or steering, do not continue your trip: call for roadside assistance.
Symptoms
- Several warning lights at once
- Lost-communication codes stored in other modules
- Functions of modules on this bus inoperative
- Scan tool cannot reach some modules
Most likely causes
- Bus wiring or connector fault
- A module on the bus failed or without power
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
What each character of U0092 means
- U: Communication network
- 0: Generic code: same on every make
- 0: Subsystem depends on the code range
- 92: Specific fault in that system
Frequently asked questions
Can I keep driving with code U0092?
It depends on which control module has dropped out. If it affects the engine, brakes, or steering, do not continue your trip: call for roadside assistance.
What causes code U0092?
The most common causes are: bus wiring or connector fault; a module on the bus failed or without power.
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.