So I built a tune to turn off EGR AND DEF, truck runs good and no check engine light or codes (turned them off) however when I first start the truck I get the message
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So I built a tune to turn off EGR AND DEF, truck runs good and no check engine light or codes (turned them off) however when I first start the truck I get the message
What message? Does it go away?
Service DEF system see dealer
It only comes on right after I start the truck then goes off and does not come back on.
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Can I ask what software are you using for editing?
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Other than it sounds like you might have missed a system check routine, if it's not limiting you, just carry on
[QUOTE=2007 5.9;246090]Other than it sounds like you might have missed a system check routine, if it's not limiting you, just carry on[/QUOTE
Doesn