U0061Vehicle Communication Bus D (-) Low
- Generic OBD-II code · Network
- How the car detects it
- U0061 reports the (-) wire of Vehicle Communication Bus D held at ground potential; a Bus D designed as high-speed CAN has CAN-Low in that role, which normally swings only between about 2.5 V and 1.5 V. Texas Instruments gives the tolerated common-mode range of ISO 11898 receivers as anything between -2 V and +7 V, so a grounded CAN-Low still lies inside the window and the receivers keep decoding; onsemi confirms that frames continue with distorted levels. What changes is current: the upper output stage of the sending node now feeds the 60-ohm load directly into ground, raising its draw to roughly 72 mA in onsemi's test. The code typically sits in one module with diagnostic transceiver while Bus D keeps working. No manufacturer documents U0061 publicly. With the battery off, CAN-Low reads near zero ohms to ground.
- What you may notice
- Often no symptom, code stored in a single module
- Occasional interference-related message errors
- Likely causes
- Likely(-) wire of Bus D chafed against a ground point or body edge
- PossibleWater in a connector linking CAN-Low to a ground pin
- RareFaulty transceiver pulling the (-) line down
- 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.