I had my truck cammed after a dod failure it’s a 2017 gmc Sierra 1500 5.3 and I got a base tune ran fine for months then I took it in for a custom intake and catch can and they changed the spark plugs and o2 sensors they tried to retune it and they said it was too unstable to try to tune the 02 sensors were all over the place so I took it home and it popped up a p06da code they only had the truck at there shop and didn’t drive it around so what could of gone wrong that caused a code to pop up out of no where
