Quote:
Originally Posted by ol_dirty_dmo
So I just had this problem. Ran it for about 50 miles and the CEL came on. Got it scanned and i have UEL headers by Borla, Invidia cat less front pipe and custome axle back exhaust. I don't have the code on me right now, BUT the code it was spitting is basically the placement of the O2 sensor on bank 1. Like someone said earlier, I'm pretty sure that primary O2 sensor needs to go IN the header. It doesn't say I'm running rich or running lean, it just said placement is wrong. I will update this when I get the code for you guys
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Read Basic Bolt on Mods Guide link below it will tell you info in their.
code will be P0420 , either use 2 space or a tune to disable code,