C0654Left Front Wheel Speed Sensor B Circuit High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Here the circuit of the second left front sensor reads above its permitted level, typically a short to the battery feed or to the supply of another channel. That risk follows from the packaging: Continental's dual-element sensor gives each element its own two-wire cable but allows both to share one outer sheath, so a crushed or heat-damaged cable can affect both channels. Volvo Truck lets both brake ECUs supply the sensor through a power multiplexer that switches over when one ECU fails. Aumovio, Continental's former automotive arm, markets the dual sensor with two electrically isolated signals under ISO 26262, so the second channel must stay separate. No carmaker publishes C0654; repair the cable or replace the sensor.
- What you may notice
- Warning for brake or driver assistance system
- Possibly both speed signals of the wheel affected
- Likely causes
- LikelySensor B line shorted to battery voltage
- PossibleShort between the two channels in a shared cable sheath
- RareInternal fault in the second sensing channel
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.