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Cat 299 xhp def issues

Mjeter

New Member
Joined
Apr 21, 2023
Messages
2
Location
Texas
Getting message after running for about 20 minutes, the machine has been sitting for about a month. Serial DX201819 and for the life of me I can’t find the def filter to change it. I did manage to get the old def out with a pump. One mechanic friend said maybe a nox sensor. Ideas?
 

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ahart

Senior Member
Joined
Nov 7, 2020
Messages
877
Location
Indiana
I have attached the troubleshooting procedure for that code.
 

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