U008DVehicle Communication Bus G (+) High
- Generic OBD-II code · Network
- How the car detects it
- U008D is stored when the (+) wire of Vehicle Communication Bus G carries excessive voltage, from a short to battery or another supply. No manufacturer documents U008D publicly. On a high-speed CAN this concerns CAN-High, and traffic often continues: NXP lists the fault among those that stay hidden unless a transceiver with bus diagnosis catches it, and onsemi saw frames still pass. The repair needs a second look, though. Texas Instruments warns that a bus wire in contact with a 24 V line drives the transceiver's short-circuit current through the terminating resistor and can burn out a 1/4 W part. After removing the short, measure the resistance between CAN-High and CAN-Low again; about 120 instead of 60 ohms means one terminator, often inside a module, has been damaged.
- What you may notice
- Often no symptom, code found during a scan
- Sporadic dropouts on Bus G after a wiring fault
- Likely causes
- Likely(+) wire of Bus G touching a battery or 24 V feed
- PossibleWater in a connector linking the bus to a supply pin
- RareTerminating resistor damaged by an earlier short
- 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.