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 Post subject: O2 sensor
PostPosted: Fri Feb 05, 2016 9:56 pm 
In Neutral
Joined: Fri Feb 05, 2016 9:54 pm
Posts: 1
I have a 97 legacy outback and my second cat it all broke apart. If I cut it off and replace it with a straight pipe is that gonna **** with my O2 sensor? Or am I better off drilling a hole and welding a nut on the pipe I replace it with? I jus don't want car to run like butt

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 Post subject: Re: O2 sensor
PostPosted: Mon Feb 15, 2016 6:48 pm 
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Joined: Tue Oct 15, 2002 11:37 am
Posts: 27381
Location: Houston, Tx
Welcome to the BBS.

Do you currently have a CEL? How do you know the second catalytic converter is broken apart?

You will need to keep the second O2 sensor there or you will get a CEL. So if you replace the second cat with a pipe you'll need to put an O2 sensor bung on that pipe so the second O2 sensor works.


1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

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