Powertrain, generic (extended)

P2831 Shift Fork A Position Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2831 is the general circuit code for the position signal of shift fork A in automated manual and dual-clutch gearboxes. How makers fill it varies widely. Mercedes-Benz uses P283100 for an electrical fault of the shift fork A position sensor in the 8G-DCT (transmission 724.1) and lists it among the codes of its guided repair tool. Ford's 2012 summary for the DPS6 dual-clutch box of Fiesta and Focus has no fork sensor at all: there P2831 marks a fault in the internal TCM chip that sets the current of the shift drum A motor, the drum that moves the forks for first, third and fifth gear. GM and Ford's TR9070 split position circuit faults into the specific codes P2833 to P2835 instead. Gear changes on the affected shaft may be refused.

Likely causes

Shift fork A position sensor electrically defective
Fault in the module's motor current controller (Ford DPS6)
Poor contact at the sensor or module connector

Symptoms

  • Transmission warning, gear display may flash
  • Odd gears unavailable or limp-home mode
  • Delayed engagement or no drive when starting off

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€200–2,500
Time1–6 h

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

Parts involved

shift fork ashift fork position sensor awiring harness

Related codes

P2832P2833P2834P2835P2836

References: static.nhtsa.gov, newtonnet.co.uk.