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Mopar Headers/Engine Malfunction Light

1K views 8 replies 5 participants last post by  str8frmw 
#1 ·
Hello All, I was hoping to get some advice, just installed my mopar long tube headers on sunday and immediately upon initial start the engine malfunction light came on, what is the reason for this and how can I resolve it, thanks in advance. scott
 
#4 ·
If this is the Check Engine Light, then it is very likely due to the relocation of the O2 sensors. Check your codes (http://www.lxforums.com/board/showthread.php?t=12361) and let us know what you find out.

If it turns out to be just a P0420 or P0430 (Catalyst Efficiency Below Threshold) then your options to try to get rid of it are either a mechanical or electical O2 simulator at this point. I'm hoping that one of the tuning companies can help us out in the future by deleting the rear O2s like was done with the LS1 edit software.
 
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