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Old 11-07-2007, 01:41 PM
spider1 spider1 is offline
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Re: P0240: Catalyst System Efficiency Below Threshold (Bank 1): UPDATE!

Quote:
Originally Posted by Cat Fuzz
Not sure you understood my advice so I will clarify: You want to switch the post cat sensors with each other. There are two cats and two sets of o2 sensors. One before and after each cat. Don't switch them front to back and back to front. Switch the post cat sensors with each other.

You should be able to have your codes erased anywhere that will read them. Usually you can find an auto parts store that has a scanner capable of clearing codes.

Oh, I didn't know there were two cats. So exchange the two Post cat sensors. I think the side i switched was the first that I saw and that's why I only focused there. i'll keep looking and see if I can switch those back. I did unhook my battery, the CEL is off for now, but I'm sure i'll come up again.

But I need to make sure I switch those.
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