Frequent Parked Regens

How many hours on the engine? When you had it baked the last time, did they mentioned to you anything unusual about it ?

 

I have a 2021 Max 13,I do a regen once a month.Very little idle hours.I have the OTR tool and can plug it in,see the soot level and all that.Ill do a regen when it gets to 50% soot level.
Hook your truck up to a test tool,it should have the history of your MIL light,it will tell you what is going on.

 

I'd recommend buying a LAPTOP, subscribing every year to Detroit Diesel's Diagnostiklink engine software, and Nexgen 3 controller so you can do it yourself.

Also, take your truck to Carlos Diesel Electric over in Montebello, CA. Watch his youtube videos on repairing DD15 engines.

He's very straightforward and I've saved thousands just watching his videos. Very Kowledgeable mechanic about emissions.

https://www.youtube.com/@CarlosDieselElectric

He is also one of the few qualified mechanics who will work on "ahem" trucks that are not stock.

 

I drove a 2018 freightliner but it had a DD 13 in it.It started getting check engine lights,on and off.EGR manifold and sensor housing needed cleaned out,that truck haf 625,000 miles on it.