Hello forum
My son is the owner of a 2017 6.7 litre turbo diesel super duty
He had some codes appear on his display. He was one was for a NoxA sensor under cab. He was and still is having issues. He would be shown a low/ no DEF fluid where he would be cut back to 50 km /hr
He could do a key reset or a battery lead reset and it would be ok for a short period of time. He currently is stuck in limp mode which means he can only get 2-3 km/ hr out of the truck.
He replaced the NOX A sensor. No luck. He replaced the DEF Quality module. With no luck. Tried force reset gen and resetting from his tuner. No luck
He tried checking over the wire harness for anything obvious after removing the loom. Nothing obvious the truck currently sits in my yard with the box taken off. He previously cleaned all the sensor plugs with contact cleaner spray one by one. No luck
We are at whits end He was still trying to bounce back from a catastrophic co4 fuel pump failure less then a year and a half ago. We need help in a bad way. Any help would be appreciated #ad

 

Just not sure what to do next. Truck has about 170k on it. I included a photo. Hoping someone can point me in the proper direction. Tks

 

Can e mail me at [email protected]. If you can help

 

Ok i know this one - I think.... back ground we have 10 ford f350 in the shop. 4 or 5 did the same thing about 2 months from start to finish and it ended up being caused by the def float sensor going bad. Yes all of them went to poop about the same time.

Hope it helps

 

Thank you. Fred. We are going to give it a shot. Much appreciated. shane

 

Hello Fred. can you elaborate a little more as to what a DEF float sensor is. Where it is. Or other name for it?

dealership is telling me it’s part of the pump assembly and not serviceable. Need your input again my friend. thanks

 

Shane I have no idea if this is any help whatsoever but did a google search:
A DEF quality sensor is mounted on the side of the DEF tank. This sensor detects the Urea concentration in the DEF to confirm it is acceptable for effective dosing (approximately 32.5% Urea).

 

Hi. This is one of tge units he replaced on his truck about a week ago. #ad

 

I believe this is the DEF quality module. Does this also give me tge DEF tank levels. Fill/empty?

 

#ad

 

Location on tank. Pointing to it. Hard to see I know

 

Wish I could say for sure Shane I just don't know. What I found says its on the tank so I have to guess maybe it is....I wonder how expensive it is?

 

That units about 200$ up here in Canada. Dealer part
It’s a DEF quality module. Also know as a redundant quality module. If there is a DEF float sensor. I’m told it would be part of the pump assembly. That’s about 1500$ plus tax canadian. And the pump assembly is “ not serviceable”
The module in the photo shown “ in my hand” was replaced with a brand new module from the dealer about 1 week ago

 

Wow!! Its a shame you can't test it. Fuel pump catastrophes, costing thousands, sensors...$300-$1500, really makes me wish I had gone diesel..