Q: Q: Engine problems

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I have a dodge 5.7 L hemi that is overheating and the battery gauge fluctuates just a little away from high power and as I was driving today is when these problems occurred iT told me to check gauges show I looked down and it said over it was overheating and then my check engine light came on and the truck slow down significantly as I’m getting ready to leave work the engine is still saying that it’s hot and my battery gauge is wavering between the lines of half and high

My car has 132559 miles.
My car has an automatic transmission.

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