Thoughts on frustrating situation.

Gosh, that's completely useless for the OP isn't it?

On the other hand, here's a publication from the Missouri attorney general's office on auto purchase and repair laws. I just looked at it quickly, but it appears Missouri has no "lemon law" that applies to used cars.

https://ago.mo.gov/docs/default-source/publications/allaboutautos.pdf?sfvrsn=4
So what would be helpful advice be???? Pay the dealers bill, 3 weeks later pay another bill, try and see what DTC's were stored in the ECM.....who gives a **** and what would he do with that info as far as getting his car repaired for free???? NOTHING