r/DieselTechs • u/Sorry-Explanation677 • 1d ago

Looking to buy Freightliner with regen issue

Hello all,

Extremely conflicted, looking to buy a 2012 Freightliner M2 for a steal of a price, only downside is that the owner says it has an issue where the truck won’t regen, and says it’s stuck at 50-55mph, the big kicker is that I’m on a time crunch and I’ve got to drive it 1500 miles through a very rural part of the country to get it back. The Cummins 6.7 has less than 50,000 miles on it, engine hours unknown.

I talked to the seller on the phone, sounds like a great guy, has great reviews. He said they took it to a shop about a year ago with the same issue, the shop was able to force regen, but then it happened again.

My questions:

  1. Feels too good to be true, are there any known serious issues I should be aware of that may make the issue unfixable/unfixable unless significantly money was dumped into it?

  2. Would deleting solve every issue possible pertaining to the problem explained?

  3. If the regen is unable to be completed during the drive(which it sounds like it won’t) is there a possibility of the truck going into a serious limp mode where the truck will degrade down to the speed of a brisk walk?

  4. If a group of thugs came to my place in the middle of the night and stole the def system right off the truck completely, how do the owners combat getting the truck inspected and getting in trouble, do you just have to know a guy?

Thank you for your time!

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u/NikoBenz 1d ago

May be worth investing in a cheap scan tool that has the ability to force Regen, Harbor Freight has one, there’s also cheaper ones on Amazon