Welcome.. I'm not a fan of modules like that. I've never come across anyone that actually said it helped. Go with a true tune from guys like GDE, PPEI, etc.
Source: https://www.usatoday.com/story/money/cars/2018/05/25/fiat-chrysler-warns-jeep-ram-dodge-owners-dont-use-cruise-control/643982002/
Well, that's a little scary.
Welcome! Hopefully the light is nothing major.. once you get the codes and/or a fix, post back as it could help anyone that might have had the same problem!
Welcome @Brown1983 ! The posts above cover this topic pretty well.. all I can say is if you like it, get it. I will admit owning an EcoDiesel without a warranty would trouble me a little bit. But, that's just my opinion.
Welcome @JMCB . I wish I had the magic answer for you, but it seems that error code is tough to solve as the dealer just throws parts at it and hope it runs ok.
If you've lost confidence, trade it in before the warranty is up.