Onboard Charger AC Input Voltage Out of Range
2012-2017 Buick Regal 2.4L I4 Hybrid
Description
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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P3401 on Other Vehicles
Common Questions
What does code P3401 mean on a 2012-2017 Buick Regal?
P3401 stands for "Onboard Charger AC Input Voltage Out of Range". The OBC is detecting AC input voltage outside the acceptable range for charging.
What are the symptoms of P3401 on a Buick Regal?
Common symptoms of P3401 include: Charging does not start, Charging fault indicator, Error message about power supply, Intermittent charge failures, Charging works at some locations but not others.
What causes P3401 on a 2012-2017 Buick Regal?
Common causes of P3401 include: Unstable grid voltage, Faulty EVSE (charging station), Damaged charging cable, OBC input voltage sensor error, Home wiring issue.