Peterbilt 2015 cm2350 list of issues

[tree98]

Thats a good place to start but if there's something internally wrong with the turbo ring, calibrating it won't solve the problem. The ecm will think the turbo position is correct but it won't be. Take the actuator off and do a turbo inspection.

If the VG ring sector gear is slipping or something else causing the actual position of the ring to be somewhere other than where it's commanded to be you could have the symptoms your having.

https://youtu.be/ZUpKb5umv_0?si=WmETkWUIXMQq6DFZ