Charge Port Inlet Temperature Sensor Fault
2012-2017 Buick Regal 2.4L I4 Hybrid
Description
The temperature sensor at the charge port inlet is malfunctioning. This sensor is critical for monitoring connector temperature during charging to prevent overheating.
Symptoms
- Charging current limited
- Charge port temperature warning
- Charging may be disabled
- Error on dashboard during charging
- Reduced charging speed
Common Causes
- Faulty inlet temperature sensor
- Corroded sensor connector
- Sensor wiring damage
- Water intrusion in charge port
- Sensor shorted by debris
Diagnostic Steps
- Read charge port temperature PID during charging
- Test sensor resistance vs temperature specification
- Inspect charge port for water or debris
- Check sensor wiring continuity
- Compare with infrared temperature measurement
Repair Notes
Replace charge port temperature sensor. Clean charge port inlet. Ensure port seal is intact.
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
P3420 on Other Vehicles
Common Questions
What does code P3420 mean on a 2012-2017 Buick Regal?
P3420 stands for "Charge Port Inlet Temperature Sensor Fault". The temperature sensor at the charge port inlet is malfunctioning. This sensor is critical for monitoring connector temperature during charging to prevent overheating.
What are the symptoms of P3420 on a Buick Regal?
Common symptoms of P3420 include: Charging current limited, Charge port temperature warning, Charging may be disabled, Error on dashboard during charging, Reduced charging speed.
What causes P3420 on a 2012-2017 Buick Regal?
Common causes of P3420 include: Faulty inlet temperature sensor, Corroded sensor connector, Sensor wiring damage, Water intrusion in charge port, Sensor shorted by debris.