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Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Check thermostat. Thermostat starts opening 176°F (80°C) and is fully open at 183°F (83°C). Replace as necessary. If thermostat is okay, check for other DTCs. Diagnose other DTCs as necessary. If no other DTCs are present, replace ECM.

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