Powertrain, generic

P0EE9 Battery Charger Coupler Temperature Sensor B Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0EE9 reports that the voltage of coupler temperature sensor B lies under its valid window. What that means thermally depends on the element. An NTC thermistor loses resistance when heated, so a low signal reads as an extremely hot pin. The PT1000 platinum sensors that Sailtran places at the DC+ and DC- contacts of its CCS2 inlet behave the other way round, and in a pull-up circuit a low signal looks implausibly cold. A short to ground pulls the line down with either type, and water in the inlet can do the same. No manufacturer documents P0EE9 publicly. Bentley's TPI 2075291/1 for the 2024 Bentayga Hybrid shows for sensor A that Low is P0D9B, even though the charger unit 00C6 showed the texts of Low and High swapped. P0EEA is the high-signal sibling.

Likely causes

Sensor B signal wire shorted to ground
Moisture or water in the charging inlet
Shorted sensor element B

Symptoms

  • Charging not started or stopped
  • Reduced charging power

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,200
Time0.5–3 h

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

Parts involved

charge port temperature sensorcharge portwiring harnesson board charger

Related codes

P0EE7P0EE8P0EEAP0EEBP0D9B

References: sailtran.com, static.nhtsa.gov, law.cornell.edu.