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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 238 (Engine Control System (1NZ-FE)) >> 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 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL MALFUNCTION THRESHOLDS CHART

Duration that both following conditions (a) and (b) met 5 seconds or more
(a) Estimated ECT 75°C (167°F) or more
(b) ECT sensor output Below 75°C (167°F)