Powertrain, generic (extended)

P2E98 Charge Port Door B Position Sensor Circuit

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E98 is the general circuit code for the sensor that reports whether charge flap B is open or shut. Mercedes-Benz documents it: in its plug-in hybrids the separate DC charging socket has its own flap, and information LI47.70-P-078563 lists P2E9873 for a supposed electrical fault of that flap's position sensor, stored in the DC charge-connection unit N116/5 and the powertrain controller, with the MIL lit and the note that the actuator does not open. Starting and charging stay normal; the cause is software, the fix a DCCU update plus SCN coding, after which the code no longer lights the MIL, and parts must not be replaced. Porsche's Taycan detects flap end positions with a reed sensor. Low, high and erratic faults are P2E9A, P2E9B and P2E9C, plausibility P2E99.

Likely causes

Software fault in the DC charging unit reporting a false sensor fault (Mercedes)
Position sensor of flap B with a wrong internal resistance
Damaged wire or connector between sensor and control unit

Symptoms

  • Malfunction indicator lamp on, charging and starting normal (Mercedes)
  • Flap B may stay shut or show a wrong status

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€0–450
Time0.5–2 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

P2E99P2E9AP2E9BP2E9CP2E9DP0CCC

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