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I have a 2006 Mazda 3i and had it since new. I love the car but today the check engine light came on. I took it to have it tested and was told that the code read "cooling temps unreadable" or something like that. I asked what that could mean and they told me that the coolant was low. I looked and it was just a hair below the minimum line. Anyone had this similar issue? So I added some coolant but the light still hasn't gone off. Any help with this would be great! Thanks in advance.