Powertrain, generic (extended)

P2E99 Charge Port Door B Position Sensor Circuit Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E99 means the position signal of charge flap B is within its electrical limits yet contradicts what the flap is doing, for instance closed although the flap was just opened. On cars with two flaps such an error has side effects, because the flaps lock each other: Porsche found on the 2020 Taycan that a bad sensor signal led to a wrong end-position decision, which then blocked the flap on the other side, and replaced both flap harnesses (campaign WLK2); a GM patent describes the same interlock with a magnet sensor per door. Audi reports two e-tron GT cases where a closed flap was read as open: a faulty actuator with oxidation or particles (2064953/4) and, later, cockpit software (2079475/1). No manufacturer ties these to P2E99 publicly. Pure circuit faults belong to P2E98, P2E9A and P2E9B.

Likely causes

Position sensor or its harness giving a wrong end-position signal
Oxidation or particles in the flap actuator that houses the detection
Software misreading the flap state at start-up

Symptoms

  • Message asking to close a charging flap although both are closed
  • Opposite flap A locked and not operable
  • Charging refused

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€0–700
Time0.5–3 h

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

Parts involved

charge port door b position sensorcharge port door b unlock actuatorwiring harness

Related codes

P2E98P2E9AP2E9BP2E9CP2E9EP0CCD

References: static.nhtsa.gov, image-ppubs.uspto.gov, static.nhtsa.gov, static.nhtsa.gov.