FCA 2017 3500 CUMMINS 6.7 HO EMISSIONS RECALL #67A

[Ken45]

I am hesitant to get Emissions Recall #67A done on my 2018 Longhorn. It has to do with "improving emissions", but what will it do to my mileage? Does anyone have any details, data, or opinions on this? Anyone notice a change in mileage or performance?
thanks

 

[Ken45]

OK, I've found a lot of info in earlier comments in this thread. I'm pretty sure my DEF usage is lower than 2% of fuel volume. So by the comments and a bit of research, it looks like I should get the recall done. It could result in cleaner engine (less EGR action?) and could maybe even increase my mileage. It will boost usage of DEF, which I think is below average at this point.
Thanks to all the poster on this thread.

 

[mbarber84]

I am hesitant to get Emissions Recall #67A done on my 2018 Longhorn. It has to do with "improving emissions", but what will it do to my mileage? Does anyone have any details, data, or opinions on this? Anyone notice a change in mileage or performance?
thanks

The 67A update is nothing more than a software update. The aim is to change (increase) the amount of DEF the truck doses into the exhaust during certain engine operating conditions. It will not change engine performance.

 

[WRCLVR]

The 67A update is nothing more than a software update. The aim is to change (increase) the amount of DEF the truck doses into the exhaust during certain engine operating conditions. It will not change engine performance.

I had this done to my 2017 3500 CTD and was on the fence beforehand. Done with the latest firmware flash for the Aisin AS69rc transmission too. The engine actually seems to run better and I have not discerned any fuel mileage difference....and the tranny flash helped with the 2-3 gear shifting. Recently did 1500 mile trip and averages 18 mpg on the interstates in N Georgia/N Carolina
As for DEF usage..you arent gonna notice much difference. Just do it and go on with your life 2 thumbs up !!