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I have an 06 LBZ with AFE air filter,Diablo Sport Preator,5" motor back exhaust.

My check engine light came on today ,just wondering if it is a common problem or does anyone know the best way to keep light off.

The trouble code reads (po401 exhaust gas recirculation)
 

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seems to be pretty common deal with aftermarket exhaust. there are some things you can do like run an egr plug and a code blocker. a few guys on here have that stuff. hopefully they'll be along soon to give you some more info.

welcome to the forum!!
 

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Hi, I'm Earth. Have we met?
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Yes the code is caused buy low exhaust pressures from the larger exhaust. you can get a code eliminator and a egr blocker from kennedydiesel.com for 30 or 40 bucks i can't quite remember the excact price. The blocker plate is not nessary but will keep all the soot out of your intake and help lower egts a hair also! i ahave installed a few on some 06 trucks its really not hard at all! I also used to use one on my o5 untill i started using efi live, but i do still have the blocker plate in!

Hope this helps
Caleb
 
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