2016 freightliner automatic HELP!

I'm thinking loose radiator hose

 

Something like that... That like doesn't come on for minor issues it could be clogged pistons radiator issues I dunno I'm not a mechanic and only been driving 3 years but had a similar issue in PA in a blizzard I stoped every 5 miles and filled my radiator reservoir.. Horrible experience

 

Hi,
Most engine brake works on your exhaust; by restricting it. Could have been the
combination of your braking, and exhaust brake, could have dropped your RPM's to stall,
like an airplane with low air-speed stalls. Doesn't necessarily quit, but darn near.
Did it quit - an you had to re-start, or just smooth out and go away?
I know when all the bells and whistles happen its chaotic,
but did you happen to notice the tachometer reading?
That's my guess; You can try to re-create the situation,
if and when you get a safe place to experiment.
A little less engine brake will stop this.

This wouldn't be the big hill right after the 80-380 split going East?

 

Get a shop to plug in and check the codes. They will be in there. Anything else is simply conjecture.

 

Do you have a Peterbuilt?

 

If so, or anything for that matter, it could be your coolant level is too low...

 

In my experience, 99% of the time its a coolant issue. The coolant level sensor sits pretty high in the reservoir tank, and will set off all the bells and whistles if it senses a low coolant condition. That includes a coolant level that is marginal on flat ground where the grade drops the coolant below the sensor.

Get froggy and climb underneath to look for coolant leaks. You may have to remove the front bumper (8 bolts, not hard). Even a very minor leak can lead to big problems. Check every hose and connection, Freightliner gets really cheap on hose clamps.

The other possible issue could be a DPF/SCR issue. The injector likes to clog, especially in cold weather, and the sensors are problematic at best. You may have to pull everything apart and clean it. There are YouTube videos to walk you through, its not actually all that difficult.

If those are NOT the issue, you will need a good mechanic and diagnostic software. That's the point where good diesel techs shine.

 

If you don't see that the coolant level in the expansion tank on top of the radiator is not at or above the full indicator mark, that's likely the issue.

If so top it off, and keep an eye out for leaks, especially slow leaks that show on the ground on cold mornings after being off all night