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Old 06-24-2011, 04:51 PM   #10
Cloudsurfer
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Join Date: Jan 2007
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Posts: 1,400
Quote:
Originally Posted by JAAY
BYPASS Pipes = you just bypassed your secondary catalytics and now your 02 sensors know it and are throwing the code. You can buy 02 extenders or have the ecu reflashed with a ROW flash.

I hope this helps.

Jay

Ummm no. The pre-cat O2s are in the headers, as are the post-cat O2s. The secondary cats have no O2s behind them.

There is absolutely no reason you should throw a CEL from removing the secondary cars.
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