Powertrain, generic (extended)

P2E9B Charge Port Door B Position Sensor Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E9B is the high-side position fault of charge flap B: the reading lies above anything a working sensor can deliver. A signal wire touching 12 V, or a missing sensor ground, letting the input drift upwards, are typical explanations. No manufacturer documents P2E9B publicly. GM's Volt tables show the A version P0CCF flagging readings over 94.5 percent of the reference once six of eight samples agree, spaced 50 ms in 2011 and 500 ms in the 2013 table, as a Type B code. In GM's magnet sensor patent the door signal mainly drives an open-door warning and the interlock between two doors, so a stuck reading tends to produce a permanent flap-open message. Low readings are P2E9A, implausible but valid ones P2E99. The driver typically cannot charge on either side until the fault is gone.

Likely causes

Position signal wire shorted to a 12 V feed
Broken ground wire of the flap B position sensor
Corroded or loose connector at the flap module

Symptoms

  • Permanent message that a charging flap is open
  • Charging not possible on either side

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–500
Time0.5–2.5 h

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

Parts involved

charge port door b position sensorwiring harnesscontrol module

Related codes

P2E98P2E99P2E9AP2E9CP0CCF

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