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Home >> Toyota >> 2012 >> Prius Three >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Except Plug-In) (Diagnostic Codes (P0010-P043F)) >> SFI System >> DTC P0116: Engine Coolant Temperature Circuit Range / Performance Problem >> Typical Enabling Conditions
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Typical Enabling Conditions

ENGINE COOLANT TEMPERATURE SENSOR COLD START MONITOR

Monitor runs whenever following DTCs are not present None
Auxiliary 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 circuit fail (P0115, P0117, P0118, P0125) Not detected
Intake air temperature sensor circuit fail (P0112, P0113) Not detected
Engine water pump circuit fail (P261B, P261C, P261D) Not detected
Thermostat fail (P0128) Not detected
Soak time 0 seconds or more
Accumulated mass air flow 1105 g or more
Fuel cut OFF
Difference between engine coolant temperature at engine start and intake air temperature Less than 40°C (72°F)
ENGINE COOLANT TEMPERATURE SENSOR SOAK MONITOR

Monitor runs whenever following DTCs are not present None
Auxiliary battery voltage 10.5 V or more
Engine Running
Engine coolant temperature circuit fail (P0115, P0117, P0118, P0125) Not detected
Intake air temperature circuit fail (P0112, P0113) Not detected
Engine water pump circuit fail (P261B, P261C, P261D) Not detected
Thermostat fail (P0128) Not detected
Soak timer circuit fail (P2610) Not detected
Soak time 5 hours or more
Either of the following condition (a) or (b) is met -
(a) Engine coolant temperature 60°C (140°F) or more
(b) Accumulated mass air flow 4125 g or more