P087AClutch Position Sensor B Circuit
- 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 P087A for a fault in that internal driver; wiring faults of the motor have their own codes (P090A, P090C, P090D). Ford's warranty extension 19N07 covers replacing the gearbox module when it is the cause, which is common here. Clutch B can then no longer be controlled safely.
- What you may notice
- MIL or transmission warning on
- Jerky take-off or shifts
- Reverse or even gears missing, limp mode
- Likely causes
- LikelyGearbox module faulty internally (motor driver)
- PossibleWater or corrosion at the gearbox module connector
- PossibleClutch B motor or its wiring faulty
- RareWeak supply to the gearbox module
- Repair
- Hard · Usually a job for a workshop.Typical cost: €400 – €1,300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.