Check Engine Light

Shot in the dark here but perhaps low coolant/bad low coolant sensor? My old Cascadia was using coolant and when it got low enough if the truck was sitting at an angle or running a grade it would drop below the sensor in the reservoir and throw the check/stop light til it leveled back out.

 

Check the water/coolant level. The sensor is really high in the holding tank.

 

Check the oil.

OR Better yet call your company and have it towed.

 

Check the coolant level, but for me it's only ever been the amber one only. When I got both amber a red while driving it was for "poor def quality". If you use def, you might have got a bad batch, or the heating element is going bad allowing the water to freeze...

 

Well guys, if your stop engine light came on, would you stop or keep going?

 

Could be a number things. More than likely it's the early stages of DPF issues. When that filter gets dirty, normal highway driving will not clean it and a parked regen might not even get it clean.

Freightliners are very fickle. I was sitting around one morning waiting for my ten hour break to end. The truck just died. Started it back up and it died again. Googled the code and it was "low coolant"

Cummins motors will tell you "low coolant" and give you ample time and are just overall better at getting you home or several hundred miles to a shop. FL's are programmed with stricter parameters regarding shut down specs.

That was the only FL code I ever googled and got a clear cut answer btw. Detroit uses a very vague software program that doesn't help the end user or shade tree mechanic much. My company doesn't have very many Freightliners left and Detroit charges a hefty annual fee to access their diagnostic software so my truck goes to Freightliner for any issues.

Sorry to ramble but in a nutshell, it's out of your hands. You'll need to get it back to your company shop for diagnostics.