Powertrain, generic (extended)

P2E9E Charge Port Door B Unlock Control Circuit Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E9E is a function check: the control unit commands flap B to unlock and then expects the position sensor to confirm an open flap. GM's tables for the A flap of the Volt set P0CD2 when that report is missing after 5 seconds (2011) or 13 seconds (2013, only above minus 12 °C), skip the test while position or output codes are active, and use Type B. No manufacturer documents P2E9E publicly, but Audi bulletins show the mechanical side on two-flap cars: on the e-tron the flap lock actuator can break if the flap is forced (2080912/1), on the Q6 e-tron broken gears in the flap motor leave it rocking at one spot (2077931/1), and on the A6 e-tron software could release the second flap's lock before the first was fully shut (2079918/1). P2E9D covers the electrical circuit.

Likely causes

Flap B lock actuator or motor gears broken, often after force on the flap
Flap B frozen, dirty or binding in its housing
Software sequencing error between the two flaps
Position sensor not reporting the opened flap

Symptoms

  • Flap B pops slightly or rocks but does not open fully
  • Flap B moves freely by hand because the actuator is broken
  • Charging flap warning, charging only on the other side

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–700
Time0.3–2.5 h

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

Parts involved

charge port door b unlock actuatorcharge port door b position sensorcontrol module

Related codes

P2E9DP2E9FP2EA0P2E99P0CD2

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