P3401moderate severityPowertrain
Onboard Charger AC Input Voltage Out of Range
on 2010 Toyota Highlander 3.3L V6 Hybrid · AWD
What this code means
The OBC is detecting AC input voltage outside the acceptable range for charging.
Symptoms
- Charging does not start
- Charging fault indicator
- Error message about power supply
- Intermittent charge failures
- Charging works at some locations but not others
Common causes
- Unstable grid voltage
- Faulty EVSE (charging station)
- Damaged charging cable
- OBC input voltage sensor error
- Home wiring issue
Diagnostic steps
- Measure AC voltage at charging inlet during charge attempt
- Test with different EVSE equipment
- Check home circuit breaker and wiring
- Read OBC input voltage PID
- Inspect charging cable and connector for damage
Repair notes
Verify home electrical supply meets requirements. Test with different EVSE. Replace OBC input voltage sensor if readings are incorrect.
Other Powertrain codes on this vehicle
P0001
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P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1