I have a 2017 Nissan Titan xd 5.0 v8 diesel and I have the ezlynk tuner and I am getting a p0601,c1118, and u1000 code from the ezlynk system. My truck still runs and drives but once I get to around 80mph it starts to accelerate then slow down and accelerate again. It does this the whole time and gets worse when I’m hauling something. Also I have an s&b cold air intake and it seems like there’s some sort of back pressure that come a out of the intake when it shifts. Not sure what is going on or what I should do and the dealership is unsure what it is also. Any help is appreciated.