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Home >> Lexus >> 2012 >> IS F >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010-P1178)) >> SFI System >> DTC P0116: Engine Coolant Temperature Circuit Range / Performance Problem >> Typical Enabling Conditions
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Typical Enabling Conditions

ALL

Monitor runs whenever following DTCs not present None
COLD START MONITOR

Battery voltage 10.5 V or more
Time after engine start 1 second or more
Engine coolant temperature at engine start Less than 60°C (140°F)
Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125) Not detected
Intake air temperature sensor circuit fail (P0112, P0113) Not detected
Thermostat fail (P0128) Not detected
Soak time 0 second or more
Accumulated mass air flow 2080 g or more
Fuel cut Off
Difference between engine coolant temperature at engine start and intake air temperature Less than 40°C (72°F)
SOAK MONITOR

Battery voltage 10.5 V or more
Engine Running
Engine coolant temperature sensor circuit fail (P0115, P0117, P0118, P0125) Not detected
Intake air temperature sensor circuit fail (P0112, P0113) Not detected
Thermostat fail (P0128) Not detected
Soak timer circuit fail (P2610) Not detected
Soak time 5 hours or more
Either of the following conditions is met (a) or (b)
(a) Engine coolant temperature 60°C (140°F) or more
(b) Accumulated mass air flow 4009 g or more