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Home >> Toyota >> 2019 >> Sienna SE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Engine Control System [2GR-FE] - Diagnostic Codes (1 Of 3)) >> SFI System >> DTC P0128: Thermostat [12/2015 - 08/2016] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
Duration that all of the following conditions 1 and 2 are met: 5 seconds or more
1. Estimated engine coolant temperature 75°C (167°F) or more
2. Engine coolant temperature sensor output Less than 75°C (167°F)
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