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I'm trying to get the old sensor out today and I feel like I'm gonna break something. Does it just pull out or is there some type of mechanism holding it together? I know the part that connects to the cat can be removed using a just a 22mm wrench.
I'm also confused about the pre and post catalyst positions. My error says that it's the sensor ahead of the catalytic converter for bank 1. I see two. One closer to the three pipes from the engine manifold, and another further down (closer to the final exhaust pipe out the back). I don't know which one to replace.
Ahead of the catalytic converter and precatalyst (like it says in service manual) should match, but they seem contradictory.
Does ahead mean precatalyst or postcatalyst?
Last edited by Viper5; 03-03-2009 at 05:23 AM.
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