So far, everyone who has the ETC error has been able to clear it with cleaning the MAP sensor and the EGR diffuser tube. There is no sensor looking for this condition so they don't see it.
Apparently the parameters on some of the systems are not as wide as before, causing the truck to suddenly throw codes. Service your MAP sensor and clean the EGR diffuser tube and see if it clears it.
would you mind pulling it and looking at it? Dealerships, you know what I mean? They write whatever they want sometimes. Just look at the MAP sensor and hold the air filter up to the light.
Lots of people. 7 to 9% of eco's die just as you described. The main bearing design or assembly is bad...on some. Some people are on their 2nd or 3rd engine. On the other hand, some engines are great and run 2 -3 hundred k miles trouble free.
I would look closely at the repair ticket and make sure they are using part number 68211202AA or 68211202AB. It is a 500 dollar water pump from Mopar but there is a GMB pump that is about 125 bucks.