Can Someone Do a Write-Up for DP + TP?

Ninkumpoop

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2009 Mazda Mazdaspeed3
I'm installing my TurboXS downpipe and a custom testpipe in the morning with a friend and I was wondering if anyone's willing to help with instructions :). Any amount of help will be greatly appreciated, especially at the parts with the O2 sensors.
 
So I got the DP and TP in but I have a CEL. I know it's because of the O2 sensors so my question is:
Do I need just one bypass sensor or two (since I had two cats that were both eliminated)?
 
So I got the DP and TP in but I have a CEL. I know it's because of the O2 sensors so my question is:
Do I need just one bypass sensor or two (since I had two cats that were both eliminated)?

i've been driving for 6000 miles with a check eng coming on and off because of the catless dp/rp. you can try some o2 simulators or get a good cat welded into the midpipe and put an o2 bung after the cat and relocate your downstream o2.
 
Your secondary 02 sensor is triggering the cel. (not the one closest to the turbo.) I did the diode cheater fix and after 4k miles no CEL...the install is not as bad as some make it out to be. If you want more specifics PM me.
 
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