You need to replace your def pump. I had the exact same thing happen right after 100k. I replaced the pump and everything has been fine ever since. It is a very easy fix.
So finally got enough time to swap out that sensor last weekend. Found it on Amazon for $35USD! I had my doubts that it would work, being as cheap as it was, but once I swapped it out, I ran the forced gen with no issues. I was over %200 when it initially started so I actually had to run the...
Great post! Very informative and easy to follow. How did everything work out after you replaced the temp sensor? I'm running into the exact same thing. I run a forced regen only for it to shut down after watching the catalyst temp sensor spike too 999.9 for a split second right around 630° C...