Powertrain, generic

P0EF0 Battery Charger Coupler Unlock Disabled - High Voltage Present

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0EF0 describes a safety lockout rather than a broken actuator: the vehicle keeps the charging connector locked because it still measures hazardous voltage at the inlet. CharIN's CCS design guide permits unlocking only below 60 V, and EVgo's interoperability guide for vehicle makers asks for release once current is close to zero, the inlet is under 60 V DC and the station has changed to state B1. If the voltage does not decay, for instance because a DC charging contactor has welded, the station leaves its output live or the vehicle's voltage measurement is wrong, the lock stays engaged and the code is logged. No manufacturer documents P0EF0 publicly. Electrical faults of the lock actuator are P0D91 to P0D98. The driver cannot remove the cable until the voltage is gone.

Likely causes

DC charging contactor stuck closed, inlet stays connected to the battery
Charging station does not switch off or discharge its output
Faulty inlet voltage measurement reporting voltage that is not there
Charging control software ending the session in the wrong order

Symptoms

  • Charging cable cannot be unplugged after charging
  • Charging fault message, sometimes only at certain stations
  • Emergency release of the connector needed

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€0–2,000
Time0.3–4 h

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

Parts involved

charge port lock actuatorcharge porton board charger

Related codes

P0D95P0D98P0D91P0D9EP0D08

References: charin.global, site-assets.evgo.com.