What are your thoughts

[snailexpress]

(04-10-2016 )Mrkentee Wrote:  Sounds like you're in a derate for some reason. It will do it silently without a check eng light sometimes. Could be sensor or dpf related. Recommend getting inline 5 with insite software from ebay. You can check this stuff yourself, do parked regrns, testing, diagnosing yourself.

Also good to have DESA testing software. It's free to download from Cummins e-mail them for the password valid for 1 year.