Hey guys, I’m new here. Been reading a lot of thread but haven’t got much info. I have a deleted and tuned 2015 LML. Got it tuned by modern diesel legion in Pasadena tx. Unfortunately I can’t go back to the tuner because we had an argument. The maf reading seems to be stuck on 637.55 g/s, causing CEL code p0103 don’t know if the tuner did it on because that’s the way he tunes or there is something wrong with the ecm or wiring. I already check the maf, wiring and all seem fine. It reads the same connect or disconnected. He connected the shift on the fly from the egr cooler temp sensor and all it does it raises the temp. I guess that’s a way to foul the ecm and make send more fuel. I’m kinda new to having a tuned duramax so I’m not too familiar with the tune works.