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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (On-Board Diagnostic [Engine Controls MZI 3.7] (2 Of 5)) >> DTC P0128:00 >> Notes

DTC P0128:00: Notes

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DTC P0128:00 Coolant thermostat (coolant temp below thermostat regulating temperature)
DETECTION CONDITION 
  • P0128:00 indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine.
POSSIBLE CAUSE 
  • Low engine coolant level
  • Inoperative CHT sensor
  • Leaking or stuck-open thermostat
  • Insufficient warm up time
  • PCM malfunction