Powertrain, generic · Transmission

P087C Clutch Position Sensor B Circuit Low

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. For P087C no maker is documented; Ford folds Hall faults into P087B. The code means the sensor signal is below its limit: signal wire shorted to ground, supply missing or a sensor without output. As with sensor A (P0807), clutch B can then only run in limp mode.

Likely causes

Signal wire shorted to ground
5 V supply to the sensor open
Sensor faulty
Module reference disturbed

Symptoms

  • MIL or transmission warning on
  • Jerky take-off or shifts
  • Reverse or even gears missing, limp mode

Repair estimate

DifficultyHardWorkshop job
Parts and labour€200–1,200
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

P0807P087AP087BP087DP087E

References: law.cornell.edu, newtonnet.co.uk, patents.google.com.