Sorry - didn’t review the whole thread - were these service techs who told you this? This is a deal breaker for me, at least for model year 2021. It is below -10 F where I live nearly every morning for three months. Sometimes below -20. Most of my trips are less than an hour. I know DEF freezes below 12 F (give or take a degree), but I didn’t think it would be this much of a problem. I see a ton of ungaraged HD diesel trucks in northern Alaska - do they have a better system?Finally got my truck back. Essentially nothing can be done now. They said check back in before next winter. Hopefully they will have redesigned the DEF system for cold weather.
My plan is to keep truck in garage. If it is below 30°F run for at least 15 min. If below 11°F run for 30min. If below 0°F run for an hour. This should work with how the heating elements are designed to operating. Allowing the system to thaw out. I hitch for me once the DEF system thaws out the CEL can be cleared and system won’t throw CEL while operating.
Best of luck to everyone. Keep an eye out for the update before next winter
The govt fines for altering the DEF system can be very steep. No one in the US does it commercially for non off-road vehicles.i'm sure asking this is probably frowned upon but.........are there any programmers out there that can offer a "simple" DEF bypass or programming patch/solution since FCA doesn't seem capable of creating a solution?
While on the gas/diesel fence I contacted a few of the popular tuners in CA along with the emissions compliant folks at GDE. GDE’s tune will be ready in the spring. It’s my understanding that theirs is entirely removable and based on their reputation and OCD levels of thoroughness, I doubt they’d let it roll out without throwing a bone for folks in colder climates to get this fixed.i'm sure asking this is probably frowned upon but.........are there any programmers out there that can offer a "simple" DEF bypass or programming patch/solution since FCA doesn't seem capable of creating a solution?
I have complained a lot on this thread but I can tell you every time I start mine it makes me smile and hitting the go pedal is pure joy!Call me a glutton for punishment. I reached out to Daniel at Gupton to see what’s entailed with me swapping back to the Willy’s diesel I had originally specc’d vs the Mojave that I ended up ordering. VIN is less than a week old, got it 48 hours after ordering but we’ll see.
This seems to be the biggest issue so far on Gen 3 and if it boils down to figuring out a clever way to get around this issue, that’s ok.
All your initial reports spooked me but man I want the diesel.