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Home >> Mazda >> 2021 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine >> No. 18 Cooling System Concerns-Runs Cold >> Notes
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No. 18 Cooling System Concerns-Runs Cold: Notes

NO. 18 COOLING SYSTEM CONCERNS-RUNS COLD (SKYACTIV-G 2.5T) DESCRIPTION AND POSSIBLE CAUSE

18 COOLING SYSTEM CONCERNS-RUNS COLD
DESCRIPTION
  • Engine does not reach normal operating temperature.
POSSIBLE CAUSE
  • Improper indication of low engine coolant temperature indicator light and/or high engine coolant temperature warning light
    • ECT sensor No. 1 malfunction
      • Instrument cluster malfunction
  • Cooling fan system malfunction
  • Thermostat malfunction (stuck at fully open)
  • Foreign material penetration in engine coolant