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Wouldn't I get another code for coolant temps sensor or cooling issues and wouldn't i notice it on my gauges? ... I'm more worried there is something wrong with my pcm.

I have a 6.4 that recently had an alternator die(not sure if it was related or not) but it was smoking and defiantly burnt up. So I ended up replacing it and the other day I was driving and i notice the H&s tuner won't communicate with my truck. so I decided to drive it anyways then I get 2-3...