Powertrain, generic (extended)

P2868 Shift Fork E Position Sensor Incorrect Neutral Position Indicated

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2868 concerns the neutral information from the fork E sensor. The signal is electrically valid, but the module judges that the neutral it shows does not fit the real state of the fifth fork, either neutral claimed while a gear on that fork transmits drive, or a fork that seems engaged where neutral has been commanded. No manufacturer documents P2868 publicly. GM's Corvette software, the one published strategy with a fifth rod, compares an unloaded rod 5 with its learned neutral and engaged bands but books deviations under the consistency code P2864; the Mercedes 8G-DCT fork E entries do not include this number either. Monitoring of this input is still demanded by CARB 13 CCR 1968.2. Lost learned values and a shifted sensor magnet are the usual suspects.

Likely causes

Learned neutral of fork E lost after module swap or repair
Magnet or target on the fork E rod displaced
Worn detent or bent fork moving the rest position

Symptoms

  • Gears served by fork E refused
  • Gear display does not match the gear actually engaged
  • Warning lamp with limp-home program

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–2,500
Time0.5–8 h

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

Parts involved

shift fork position sensor eshift fork etcm

Related codes

P2864P2869P2848P2863

References: law.cornell.edu, gsi.ext.gm.com.