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Home >> Toyota >> 2019 >> Highlander XLE, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> SFI System [2GR-FKS] - Diagnostic Codes - (Except Hybrid) (1 Of 4) >> SFI System >> DTC P0128-00: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) [11/2016 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

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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