Hi Guys,
I'been getting gray hair cause of this. I got "service engine soon" burning. Before there was one active code, water temp sensor 15. Put in a new one. Now I have 23 "air intake sensor error". Well I'm pretty sure that this old 6.2 doesn't have one...Right?? There's more. After checking this code (with jump wire) it's gone. But after some driving it gets back.
Also have this issue with OD jumping on and off but that's a different story (hope that OD problem was related to error 15 but as it now seems after few test runs OD problem still exists).