Had the check engine light come on a few times, the code is something to do with the coolant system. The temperature gauge doesn't like to register. Replaced the temp sensor, flushed the system, and checked for air pockets... nothing. The fuse was a little loose for the gauges, replaced it. Any ideas? Unsure if directly related, but the radiator housing unit is dual fan. I've been told that only one fan (as it is) would be spinning until i turn on the AC. Should both be spinning regardless, or is that not normal and potentially connected to the issue at hand?