U0062Vehicle Communication Bus D (-) High
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- U0062 means the (-) conductor of Vehicle Communication Bus D is forced high, usually by contact with battery plus. Built as high-speed CAN, Bus D carries this fault on CAN-Low, which can then no longer be pulled down any more; onsemi and NXP both list this short among those under which no frame gets through, so every Bus D member eventually ends up bus-off and other networks log its absence. Diagnosing transceivers such as NXP's TJA1041 recognise the short when its resistance is between 0 and 50 ohms. Texas Instruments adds a hardware angle: termination resistors should be rated for such a short, since a bus wire shorted to a 24 V line loads them with the transceiver's short-circuit current times that voltage, enough to destroy a quarter-watt part. No manufacturer documents U0062 publicly. CAN-Low near battery voltage confirms it.
- What you may notice
- All functions on Bus D fail together
- Lost-communication codes in modules on other networks
- Warning lamps or fallback modes depending on the modules involved
- Likely causes
- Likely(-) wire of Bus D chafed against a battery or ignition feed
- PossibleWater in a connector linking the (-) wire to a supply pin
- RareTermination or transceiver damaged by a lasting short to supply
- 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.