exhaust sensor post cat
Posted 27 October 2009 - 09:13 PM
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Posted 28 October 2009 - 04:25 PM
With the cat hot, if the post-cat oxygen sensor signal is fluctuating in synch with the upstream one then the cat is gone and a code appears.
sample the exhaust gases to confirm cat failure?
did they measured the in and out cat temperatures?
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