U0067Vehicle Communication Bus E (+) Low
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- U0067 tells of the (+) conductor of Vehicle Communication Bus E being grounded. For a Bus E built as a high-speed CAN that is CAN-High, which a dominant bit needs to raise by about a volt; grounded, it cannot. onsemi describes the resulting cycle: the controller attempts a start-of-frame, fails, flags errors, becomes error passive and finally bus-off, then must wait for 128 groups of eleven recessive bits before it may try again, so its transmit line is active only about 2 % of the time. Every Bus E node goes silent, and modules on other networks log them as missing. NXP's fault-tolerant TJA1055 low-speed chip, by contrast, carries on despite the same short. No manufacturer documents U0067 publicly. CAN-High at a few ohms to ground with the battery off confirms it.
- What you may notice
- All functions on Bus E fail together (high-speed type)
- Missing-message codes in modules on other networks
- Likely causes
- Likely(+) wire of Bus E chafed through to body ground
- PossibleHarness trapped behind the dashboard or a trim panel
- RareShorted transceiver in a module on Bus E
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.