What does the gauge on the MM3 marked STC-IT monitor? I was looking at it today and it went above 112 and beneath it was a red line, after driving awhile it went down below 100 again with no red underline? It's the first time I noticed it but will watch it, I guess it's the red underline that got my attention. I had driven about 200 miles and was sitting idle for about 20 mins when I noticed it.
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