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Home >> Suzuki >> 2006 >> Grand Vitara Premium, RWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine General Information And Diagnosis >> Diagnostic Information And Procedures >> DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) >> DTC Detecting Condition and Trouble Area
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DTC Detecting Condition and Trouble Area

DTC DETECTING CONDITION CHART

DTC detecting condition Trouble area
Measured ECT is 75°C or less even though estimated ECT on the basis of engine heat (calculated from MAF, INJECTION VOLUME, etc). has reached 80°C after 15 min has elapsed from starting engine with ECT at 56°C or less.
(2 driving cycle detection logic, monitoring once per driving cycle)
  • ECT sensor and its circuit
  • Engine cooling system
  • ECM