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Can you remove the two BIG main cats and not get error codes?

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Old 09-22-2001, 01:56 PM
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Can you remove the two BIG main cats and not get error codes?
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Old 09-22-2001, 02:49 PM
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unrelated but "You've Got Mail"
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Old 09-22-2001, 05:57 PM
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Not without some sort of O2 simulator
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Old 09-22-2001, 06:08 PM
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Default It's possible to fool OBDII...
by taking the downstream O2 sensor slightly out of the way of the exhaust gases, like with a spacer. I never tried this on an Audi, but seeing how it's also OBDII it should work.
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Old 09-22-2001, 08:02 PM
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Will work just as long as you don't remove the pre-cats
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Old 09-23-2001, 05:42 PM
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Yes but it's pointless since the precats are the real issue...
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