Detroit dd15 longevity?

Yeah it's just a check engine light it won't shut you down but you'll have to get it reset to go off

 

Congratulations on pay off. I've had most same problems as you only later miles. All my truck been good never left me on side of road yet. Lol fingers crossed

 

is that a filter between the def tank and the def pump? might need to check mine, almost 400k never even looked at def system, just keep the tank full 24/7 so it doesn't make any crystals

 

It’s mounted on the back side of the tank.

 

Yeah getting to all the def stuff tucked behind my def tank was quite the tight squeeze , I can squeeze under my Cascadia with all the aero stuff but if you have any kind of belly good luck lol . If you ever get a Def line heater fault dont panick , my truck never went into limp mode drove 4 days with that fault and check engine lights on .

 

If on a fre

 

Freightliner recommends 50k.