What Causes High Engine Coolant Temperature in Odyssey?

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First, check whether the engine coolant level is insufficient, which may cause high engine temperature. Inspect the circulation status of the coolant for potential flow restrictions. Additionally, components such as the coolant temperature sensor, water pump, thermostat, and cooling fan should be examined as they may also contribute to elevated temperatures. Below are relevant details: 1. Common causes of false high temperature readings in Odyssey: High-speed operation of the electric fan; Aging radiator; Insufficient coolant; Radiator blockage. 2. Coolant temperature sensor: The internal component of the automotive coolant temperature sensor exhibits higher resistance at lower temperatures and lower resistance at higher temperatures. Installed in the engine block or cylinder head water jacket, it directly contacts the coolant to measure engine cooling liquid temperature. The sensor is mounted on the engine block/cylinder head water jacket with direct coolant contact to monitor the engine's cooling liquid temperature.