DEF Systems Can Now Be Disabled if they Fail

[redbaron]

Had a catastrophic failure where the entire DPF fell off. Temporarily fixed it with a straight pipe and software update.

 

[Porterhouse]

It may be a good time to proceed with the rest of the diesel delete.

 

[redbaron]

It may be a good time to proceed with the rest of the diesel delete.

Oddly these fell out as I was collecting the DPF.

 

[Porterhouse]

I could never understand how anyone could come up with such an emission system that, in the name of lowering the concentration of a relatively harmless and natural atmospheric gas (NO2), destroys engine efficiency such that millions of gallons of extra fuel have to be needlessly burned each year. I hope the new EPA gets rid of these NO2 standards. They have no impact on global NO2 levels and are only useful in a handful of situations that can be dealt with locally.

 

[redbaron]

the one and only positive effect of the DEF system is the removal of the smell. This is more obvious when idling for a period of time.

While the GHG rules were repealed in 2026, NO₂/NOx vehicle emission standards were not affected or removed.

For the most current official details, check epa.gov/regulations-emissions-vehicles-and-engines.