Isx unknown derate

[Papa_Buck]

Update problem solved


Thank you everyone for your suggestions. With the help to monitor the egr sensors, the problem resulted in the pressure sensor (which was only 3 months old) sending random values. Watching the sensor it would send random numbers all over the place. I guess that’s why the computer couldn’t decide on a derate percentage or time. I replaced the sensor and the derate instantly went away. I am still not sure why the faulty sensor didn’t generate a fault codes or cel.

Thank you everyone