P3421moderate severityPowertrain
Charge Port Locking Actuator Malfunction
on 2010 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
The charge port locking mechanism that secures the charging connector during a charge session is not functioning properly.
Symptoms
- Unable to lock charging connector
- Charging connector falls out
- Unable to remove connector after charging
- Charge session will not start (safety interlock)
- Charge door warning light
Common causes
- Lock actuator motor failure
- Lock mechanism jammed
- Actuator wiring fault
- Charge port assembly damage
- Ice or debris in lock mechanism
Diagnostic steps
- Command lock/unlock via scan tool
- Inspect lock mechanism for obstruction
- Test actuator motor operation
- Check actuator wiring
- Try manual release mechanism
Repair notes
Replace charge port lock actuator or clean mechanism. Emergency manual release cable can be used as temporary measure.
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