Powertrain, generic (extended)

P2841 Shift Fork D Position Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2841 indicates that fork D reports a believable voltage but an implausible position. GM's 2023 table runs the rod 4 consistency test in the Corvette only when neither the even-clutch speed signal nor the output speed signal has shown an electrical fault for at least 100 ms, so the comparison has trustworthy speeds behind it. During engagement the sensor must reach the learned engaged point within 1100 µm once over 600 N push the rod; during release, a rod that stays within 1000 µm of its starting point counts against it. Type A, with a recovery attempt on the even shaft synchronizer. Ford's 2024 summary uses P2841 for TR9070 rod sensor 4 consistency and P277F for its drift, and Mercedes-Benz names it a fork D sensor malfunction on the 8G-DCT.

Likely causes

Rod 4 or its synchronizer sticking so the fork lags behind the command
Outdated learned positions after a clutch or sensor replacement
Fork D sensor or magnet shifted in its mount

Symptoms

  • Hesitation or repeated attempts on even-gear shifts
  • Gear not held, slipping back to neutral
  • Warning lamp with reduced gear range

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–3,500
Time1–10 h

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

Parts involved

shift fork dshift fork position sensor dwiring harness

Related codes

P2840P2842P2843P2844P2848P283C

References: gsi.ext.gm.com, fordservicecontent.com, static.nhtsa.gov.