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Home >> Lexus >> 2017 >> IS 300 F Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 187 (Engine Control System (2GR-FKS) - Diagnostic Codes (2 Of 7)) >> SFI System >> DTC P0128-00: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) [10/2017 - 09/2020] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

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Duration that both of the following conditions are met 5 seconds or more
(a) Estimated engine coolant temperature 75°C (167°F) or higher
(b) Engine coolant temperature sensor output Less than 75°C (167°F)
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