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How to diagnose a faulty coolant temperature sensor in an Audi A4?

I have been experiencing issues with my Audi A4 overheating and suspect it may be due to a faulty coolant temperature sensor. How can I diagnose if this component is indeed the problem?

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One way to diagnose a faulty coolant temperature sensor is to use an OBD-II scanner to read the live data from the sensor. Compare the temperature reading to the actual temperature of the engine to determine if the sensor is functioning correctly.

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