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Home › Mazda › 2012 › 6 s Touring Plus › Repair and Diagnosis › Engine Performance › System › Symptom Troubleshooting [Engine Control System - MZI 3.7 V6] › No. 18 Cooling System Concerns-Runs Cold › Notes

No. 18 Cooling System Concerns-Runs Cold: Notes

18 COOLING SYSTEM CONCERNS-RUNS COLD
DESCRIPTION 
  • Engine takes excessive time to reach normal operating temperature.
POSSIBLE CAUSE 
  • A/C and heater system malfunction
  • Thermostat malfunction
  • Cooling fan system malfunction
  • Improper water temperature gauge operation
    • CHT sensor malfunction
    • Instrument cluster malfunction
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