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2013 LEXUS LS 600H
5.0L V8 Hybrid•AWD•AUTOMATIC•hybrid
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Repairs0Labor480Torque2158Fluid8DTC1909Battery1Maintenance0Recalls0
P3420moderate severityPowertrain

Charge Port Inlet Temperature Sensor Fault

on 2013 Lexus LS 600h 5.0L V8 Hybrid · AWD

What this code means

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

  1. Read charge port temperature PID during charging
  2. Test sensor resistance vs temperature specification
  3. Inspect charge port for water or debris
  4. Check sensor wiring continuity
  5. Compare with infrared temperature measurement

Repair notes

Replace charge port temperature sensor. Clean charge port inlet. Ensure port seal is intact.

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