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Can the DEF system be removed?

Can the DEF system be removed?

Postby Pipsfc [OP] » Jan 01 2021, 3:00am

I had my truck at the dealership service center today to get my coolant system looked at and the maintenance tech told me that the DEF system can be removed and that some states like Idaho don't require it. Is that true? I ask because I'm moving back to Alaska in February (from Nevada) and if I don't have to deal with DEF freezing in the winter I want to make this transition? I'm still trying to determine if Alaska requires it too?
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Re: Can the DEF system be removed?

Postby 19trax95 » Jan 01 2021, 3:18am

It is illegal on the federal level. So doesn't really matter what state your in, it's technically illegal.

But it absolutely can be done, and should be done to make the truck reliable again.
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Re: Can the DEF system be removed?

Postby Zrock » Jan 01 2021, 4:20pm

This is why the lines/tank are heated by the time Def thaws out from freezing the engine is requiring some... People drive veh all the time in hose temps with no issues
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Re: Can the DEF system be removed?

Postby 06MonteSS » Jan 01 2021, 4:43pm

Not legally, no.... and can/will void your warranty.... and honestly, I'm surprised the tech even told you that, as it's part of the federal emissions standard/system....
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Re: Can the DEF system be removed?

Postby Pipsfc [OP] » Jan 01 2021, 5:22pm

Well that sucks! Thought maybe I had a light at the end of the tunnel. Thanks for the info all.
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Re: Can the DEF system be removed?

Postby OilFracker » Jan 01 2021, 5:24pm

Removing the DEF is risky. If you avoid living in emissions testing states, avoid DOT inspections and trust your mechanics to not rat on you then go for it. Also keep the parts readily available to reinstall for when you sell your vehicle. If the person who buys your rig gets caught they will investigate it back to you and fine the poop [emoji90] out of you too.

Not worth it IMO. But should be considered based on your circumstances for sure.

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Re: Can the DEF system be removed?

Postby 19trax95 » Jan 01 2021, 5:31pm

If you want a reliable truck, then go for it. I wouldn't worry about it on a personal vehicle. On a commercial truck maybe, but even then, it's easy to make it look right, and keep it quiet.

Just keep in mind for the L5P trucks it's a bit more expensive to do than the older trucks due to needing a new ecm. But other than that, the process is the same.
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Re: Can the DEF system be removed?

Postby adam86107 » Jan 01 2021, 5:49pm

The price has gone down a good bit from what it was. When HP Tuners first offered the exchange program it was around $3000. Now, the exchange is $650 and now there is an option to buy an ECM for $1500.

This is just the cost of the ECM and doesn't including tuning or the hardware to do the tune.
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Re: Can the DEF system be removed?

Postby 19trax95 » Jan 01 2021, 5:51pm

Yeah the prices have definitely gone down for sure. It's right around double all said and done for the tuning portion (ecm and tuning included) compared to the older trucks. Of course it depends what kind of tuning you go with, but comparing the same tunes between the two, it's about double, mainly due to the ecm. It's worth it though haha
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Re: Can the DEF system be removed?

Postby GBSierraSLE » Jan 01 2021, 7:24pm

Just wondering, could the DEF system be turned-off, similar to tuning out AFM, instead actually removing it?
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