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Old 10-24-2014, 09:30 PM
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Quote:
Originally Posted by David.X5 View Post
I've been told that post-cat O2 sensors are not part of the loop controlling engine performance, but instead are used to determine the health of the cat system. So if this theory is correct, it may throw a code, but the post-cat O2 shouldn't cause poor performance.

See for example - 12v Pages - The Engine - How it Works


You are correct.
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