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Old 10-08-2012, 05:36 AM   #32
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Originally Posted by Superd View Post
The coolant cant physically heat up and cool down in such a short period of time so it sounds like a faulty temp sensor. Should be an easy fix for the dealer.
Not always. If the thermostat is sticking sometimes (opening at a higher temperature than normal), it can give this illusion of overheating/rapid cooling as well.

However, a faulty sensor or grill shutter issue posted above is more likely.
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