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Home >> Lexus >> 2010 >> GS 350 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Engine Control System (DTCS P0010 - P0368)) >> SFI System >> DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
Duration that both of the following conditions 1 and 2 are met: 5 seconds or more
1. Estimated 75°C (167°F) or more
2. ECT sensor output Below 75°C (167°F)
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