OBD-II FAULT CODE
P0380

Glow Plug/Heater Circuit "A" Malfunction

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0380.

PowertrainSystem
HVAC / climate controlCategory
LowSeverity
  • Check Engine light
  • Poor drivability or reduced fuel economy depending on fault
  • Faulty control head/switch
  • Blend door actuator fault
  • Blower resistor/motor issue
  • Wiring/fuse fault
  • Scan all modules and record freeze-frame data before clearing codes
  • Check battery voltage and related fuses
  • Check HVAC fuses, actuator movement and scan-tool HVAC data if available
  • Repair wiring/fuse issue, replace failed actuator/motor/control part after testing
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.