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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 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
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