X15 2450 low power high fuel consumption

[Will144]

Just looked up the code in work orders. New one is KW10431.06 the old one is KW10091.04. I asked the dealer to put the old one back in to try it. They said they couldn't. I'm not sure how to do that part myself. I'm using a company truck until I get it fixed right. Just don't need to burn it up by driving it when it's sick.