2009 Freightliner Cascadia

Have you checked the coolant level? The coolant sensor is prone to leaking after a few years. If the coolant drops below the sensor, you will have the check engine and stop engine lights come on and shut the engine down within 60 seconds. You should have an override switch on your dash to keep the truck running, though you will have to keep hitting the override switch every 1-2 minutes. Check and see if the coolant level is at or near the level that the coolant sensor plugs into the reservoir. If the coolant level is not dropping below the sensor level, the coolant is leaking out through the sensor. If the coolant has dropped well below the sensor, you may have a crack in the coolant reservoir.

 

Some facts from dealing with a friends DDEC VI motor in a 2009 Crapcadia...
Replaced turbo due to actuator throwing codes. I say run with it, he got it swapped.
More wiring problems than anything else. The engine wiring harness is crap, and either shorts out or loses connections on a near monthly basis.
Has had turbo speed sensor wiring repaired and God knows what else, and the last thing was a sensor at the DPF filter. New harness is @$600, and can be installed DIY.
The turbo "coughing" seems to be a common thing with DDEC VI Series 60's. It keeps spooling at gear changes, and dumps the compressed air into the air filters, and makes the coughing sound between downshifts etc.
If it idles, the DPF filter may be getting to it's serviceable limit. The DPF has a timer on its own ecm basically. Detroit recommend just over 400k miles IIRC. Check to see if it was cleaned etc. Exchange they are @$800.
The injector from the doser block needs to be cleaned pretty regularly, to allow it to regen properly. I just did mine (77k miles, low idle time) and it was indeed sooted up. Remove the fuel line carefully, remove the injector. I half filled a lid from a tin of brake cleaner and gave it a bath in brake cleaner. Cleaned right up. 12mm and 14mm wrenches, and takes 2 minutes to remove.
Go into a GOOD Detroit shop and look over all the parameters and settings in the ecm. Not a lot should be shutting it down, unless it was messed with by an idiot tech in a company shop. Low coolant is the number one thing that should be shutting it down. Get the codes read and see what it says. The coolant bottle in my Western Star will only stay half full basically. Anything else and it spits it out. Stays at that level though, so it's fine.
There are some suggestions from my experiences with these engines. It needs to go to a GOOD Detroit shop, and they will make it 100 times better.
Cylinder balance and cutout tests, put it into regen and watch the back pressure for being at 4psi or above, dyno it.
Martin

 

DDDL will do all the tests, and read data from the regen etc.

Martin

 

There are 3 power settings in DDEC VI IIRC. You want the one at the top of the three, which is 515 all the time. Torque may be limited in upper or lower gears I guess, never seen that setting myself.

Martin

 

My experience with Freightliner has been their warranties are worth crap!! If there is any type of engine related problem on a Detroit Diesel engine you are much better off to go to a Detroit Diesel shop. Better service and workmanship. They will also take care of warranty issues.

 

My truck is doing the same thing right now, it's only happened one other time to me and our mechanic told me to pin the ovrd shutdown switch until I get back. Gauges look normal. These things are piles.

 

Check the coolant sensor open and clean the sensor. Or replace it. It happened to my 2010. I replaced it that light is gone for goog..