U0091 - Vehicle Communication Bus G (-) shorted to Bus G (+)
U0091 is a generic network/communication diagnostic trouble code indicating Vehicle Communication Bus G (-) shorted to Bus G (+). It relates to the System-Specific system.
DTC Breakdown (SAE J2012)
| System | Network/Communication (U) |
| Type | Generic |
| Subsystem | System-Specific |
| Fault Index | 91 |
| Standard | SAE J2012 / ISO 15031-6 |
What does diagnostic code U0091 mean?
The dtc/">diagnostic trouble code U0091 represents Vehicle Communication Bus G (-) shorted to Bus G (+). This standard generic code points to a monitored fault condition in the vehicle's Network/Communication network.
Detailed diagnostic guides and specific fix procedures for code U0091 are currently being compiled. Always verify check engine warnings with a qualified mechanic.
Frequently Asked Questions about U0091
What does U0091 mean?
The diagnostic trouble code U0091 represents Vehicle Communication Bus G (-) shorted to Bus G (+). This standard generic code points to a monitored fault condition in the vehicle's Network/Communication network.
What is the system for U0091?
The U0091 code is located in the vehicle's Network/Communication network.