Cascadia shut off automatically while driving

I had to change out the PNDB on mine 50-60k ago, I’m now at 590, it’s very possible, if it is that box, it’ll do it more and more.

 

A friend of mine had the same problem with Cummins ISX. He tried this and that but the problem was not fixed until after he replaced the engine harness.

 

Start with the grounds, not the battery terminals but the grounds from the ecm, the chassis harness and the batteries.

 

Could be coolant level sensor as well .

 

That would send a engine warning light, not a stop engine order to the ECM.

 

I drive cascadia now and have this problem , check engine light pops up and next second stop engine .
In my case its bad coolant level sensor , mechanic said he changed something through the ECM so my truck doesn't shut off ...have it first 30 min after start

 

I have a 2016 and back at around 250k miles, there was a problem with a relay box in the firewall warping or cracking and allowing moisture in, which caused the truck to intermittently shut down when driving.

I was told by Freightliner that this was a known problem. It might have even been a recall item.

I do not know if your 2015 has the same relay box mine had, but it's something to look at.

 

I have had a bad coolant level sensor stop my engine before, back when I first started seeing symptoms of a cracked head. Oil and fuel were mixing into the coolant and the coolant level dropped. The coolant level sensor failed, and the truck would not stay running. No overheats, it simply shut down with coolant level errors.

2016 Freightliner with DD15

 

When your truck gets 2 quarts low. The lights comes on and the engine shuts down..

If the truck gets hot.. The lights comes on and engine shuts down..

I drove a 12 FL and a 16 FL and a 07 w900.
They all did that.