Powertrain, generic (extended)

P2E9C Charge Port Door B Position Sensor Circuit Intermittent/Erratic

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E9C covers a flap B position signal that flickers or drops out briefly instead of failing for good. Common sources are loose terminals, a harness bent at every flap movement, or a sensor sitting loose in its holder. No manufacturer documents P2E9C publicly. Two official cases show how fragile this signal path can be on two-flap cars. Porsche replaced the harnesses of flap A on the driver side and flap B on the passenger side of 2020 Taycans because an incorrect sensor signal made the car misread the end position. Audi traced wrongly shown flap states on the e-tron GT to the actuator, naming oxidation and foreign particles inside it. Lasting faults are P2E98, P2E9A and P2E9B, plausibility errors P2E99. Drivers see a flap status that changes on its own or charging warnings that come and go.

Likely causes

Loose terminal in the position sensor connector
Harness to flap B strained or chafed by flap movement
Oxidation or particles in the flap actuator with integrated detection

Symptoms

  • Flap status in the display switches without reason
  • Sporadic charging flap warnings or interrupted charging

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–600
Time0.5–3 h

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

Parts involved

charge port door b position sensorwiring harness

Related codes

P2E98P2E99P2E9AP2E9BP0CD0

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.