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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Engine Control System Self Diagnostics - V8) >> Diagnostic Tests >> DTC P0128: Coolant Thermostat Malfunction >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

If the engine coolant temperature does not reach 167°F (75°C) after engine warm up, it is abnormal.

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