U0094Vehicle Communication Bus H (+) Open
- Generic OBD-II code · Network
- How the car detects it
- U0094 reports that the (+) wire of Bus H is interrupted, CAN-High where Bus H is a CAN. No manufacturer documents U0094 publicly. How much the break matters depends on the kind of CAN. A fault-tolerant low-speed CAN up to 125 kBd, built with transceivers such as NXP's TJA1055, keeps receiving differentially with a broken CANH wire, and the chip's error output toggles only if the gap separates the sending node from the listening one, so the module may see the fault only now and then. A high-speed CAN loses the far nodes. For locating it, Nissan's chart separates a break in the main line from one in a branch to a single module, judged by the resistance and voltages measured at the diagnostic socket.
- What you may notice
- Single modules on Bus H not reachable
- Fault appears intermittently or with movement
- Likely causes
- LikelyBroken (+) wire, e.g. at a hinge or flexing harness section
- PossibleTerminal pushed out of a connector
- RareCorroded splice with high resistance
- 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.