Exhaust fluid system fault - Diesel Forum - TheDieselStop.com
6.7L Power Stroke Engine and Drivetrain Discussion of the 6.7L Power Stroke diesel engine and drivetrain in the 2011-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.7L Power Stroke engine.

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post #1 of 2 (permalink) Old 10-20-2019, 10:18 AM Thread Starter
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Exhaust fluid system fault

Hello and thanks for your time, I'm new to the site as well to the diesel world.
I recently purchased a SCT GTX & a 2015 powerstroke 6.7 super duty. Since I hooked it up the truck throws a "exhaust fluid system fault" which has the truck stuck in limp mode.
The truck did have a previous owner who put on a 4 inch turbo back straight exhaust & I'm to new to know if they did anything else.
Then the only thing I did was add a K&N filter to the air box.
The truck ran great no issues until I installed the SCT GTX.
Any help would be appreciated.
Thank you for your time
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post #2 of 2 (permalink) Old 10-21-2019, 02:47 PM
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You need to upload the original tune back in the truck. It would appear that the truck had a modified tune in it when you got it. The new tune told the computer that the DEF was still in the truck and from the sound of your post it's gone. The tune that you got didn't include a DEF delete.
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