P0EF1
Battery Charger Coupler Unlock Disabled
The battery charger coupler unlock is disabled - safety condition prevents unlocking. HV active or charging in progress.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Common causes
Ordered by how often each turns out to be the cause.
- HV system still activeCommon
- Charge session not terminatedPossible
Parts involved
- Battery Charger Coupler Lock
- Bms
P0EF1 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.