I do have a service manual for this vehicle. I will put the offer up for you on the cost of it.
How are you pulling the codes on the unit?
191 is output shaft speed sensor code
524 is there is a J1939 information missing. That is becuase there is a sensor not sending the right sognal. It can be any of them or related to the codes you have.
2900 is Accelerator Pedal sensor Signal out of range
3719 Regen needed. Soot level high
3351 DPF filter worn and needs replaced.
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