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Home >> Lexus >> 2006 >> IS 350 >> Repair and Diagnosis >> Engine Performance >> Engine Control System (2GR-FSE) >> SFI System >> DTC P0116 Engine Coolant Temperature Circuit Range / Performance Problem >> Description
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DTC P0116 Engine Coolant Temperature Circuit Range / Performance Problem: Description

A thermistor is built into the Engine Coolant Temperature (ECT) sensor, of which the resistance value varies according to the ECT. The structure of the sensor and its connection to the ECM are the same as those of the Intake Air Temperature (IAT) sensor.

DTC DETECTION CONDITION

DTC No. DTC Detection Condition Trouble Area
P0116 ECTs as listed below are nearly same (2 trip detection logic):
  • ECT when engine is started at lower than 60°C (140°F) of ECT
  • ECT when engine is warmed up
  • Thermostat
  • ECT sensor
ECT does not change while driving when engine is started at higher than 60°C (140°F) of ECT (2 trip detection logic)
ECTs as listed below are nearly same when engine is started at higher than 60°C (140°F) of ECT (2 trip detection logic)
  • ECT when engine is stopped after driving
  • ECT when engine is started at lower than 60°C (140°F) of ECT