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Home >> Lexus >> 2017 >> LX 570 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (1 Of 7) >> SFI System >> DTC P0116: Engine Coolant Temperature Circuit Range / Performance Problem [09/2015 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

ECT SENSOR COLD START MONITOR:

ECT sensor value change Less than 5°C (9°F)
ECT SENSOR SOAK MONITOR:

Difference between current ECT sensor value and previous ECT sensor value when engine stopped Less than 5°C (9°F) [varies with ECT of last trip engine stop]
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