Peterbilt 579 2024 Transmission Fault Nf. This may be caused by numerous reasons such as fluid leaks, solenoid faults, worn out gears, and low fluid leaks in your transmission. They should be using serviceranger software if possible to check for codes.
So far i know that the trans fault code 31 is for meiir. I have a 2020 peterbilt 579 with the awful collision mitigation system and i have a question regarding the hookup for tweaking the settings or hopefully disabling the whole idiotic thing all together.