Powertrain, generic · Transmission

P087B Clutch Position Sensor B Circuit Range/Performance

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Hall sensor in the clutch B motor faulty
Wiring or connector between motor and gearbox module
Input of the gearbox module faulty
Water ingress or corrosion

Symptoms

  • MIL or transmission warning on
  • Jerky take-off or shifts
  • Gears skipped, vibration

Repair estimate

DifficultyHardWorkshop job
Parts and labour€300–1,300
Time1–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

clutch position sensorclutch actuator motorsensor wiringtransmission control module

Related codes

P0806P087AP087EP07A4P07A5

References: newtonnet.co.uk, law.cornell.edu.