Powertrain, generic (extended)

P2E9F Charge Port Door B Unlock Control Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E9F is the low-voltage form of the flap B release output fault: the driver stage measures its control line close to 0 V where a higher level is expected. A control wire chafed to body ground or an actuator winding that has shorted are the usual culprits, and a protective fuse or driver shutdown can follow. No manufacturer documents P2E9F publicly. GM's Volt folds this case into the combined A code P0CD1, judging a short to ground only while the release is commanded. A GM patent shows what the line feeds: a briefly energised actuator retracts a post so a spring can push the flap open, after which power is removed. Porsche's Taycan bulletin 186/24 has technicians check the lines and plugs of the flap servo motors before replacing modules. High-level faults are P2EA0, the function test P2E9E. Flap B then stays shut.

Likely causes

Control wire of the flap B actuator shorted to ground
Shorted winding in the flap B actuator or motor
Water in the actuator connector

Symptoms

  • Flap B does not release on any request
  • Blown fuse for the flap circuit possible

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–600
Time0.5–2.5 h

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

Parts involved

charge port door b unlock actuatorwiring harnesscontrol module

Related codes

P2E9DP2E9EP2EA0P0CD3

References: gsi.ext.gm.com, image-ppubs.uspto.gov, static.nhtsa.gov.