P087BClutch Position Sensor B Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- Clutch position sensor B reports the position of the second clutch or its actuator, the counterpart of sensor A (P0805 ff). The only documented user is Ford's dry DPS6 dual clutch in Fiesta and Focus: clutch B, for reverse and the even gears, is moved by a three-phase motor whose Hall sensors give its position, and the gearbox module drives it through an internal motor driver. Ford sets P087B for a Hall sensor fault on the clutch B motor: one Hall signal is missing or implausible, so the module no longer knows the motor and clutch position reliably. The counterpart for clutch A is P0806. Judder, missed shifts and limp mode follow, with MIL.
- What you may notice
- MIL or transmission warning on
- Jerky take-off or shifts
- Gears skipped, vibration
- Likely causes
- LikelyHall sensor in the clutch B motor faulty
- PossibleWiring or connector between motor and gearbox module
- PossibleInput of the gearbox module faulty
- RareWater ingress or corrosion
- Repair
- Hard · Usually a job for a workshop.Typical cost: €300 – €1,300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.