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O2 sensors ???'s

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Old Jul 5, 2011 | 04:36 PM
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dickeymoore's Avatar
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O2 sensors ???'s

How many O2 sensors are on my 2001 Z28 and is there a way to tell which one is bad,I know these things are pricey would like to know which or are all of them are bad?THANKS
Old Jul 5, 2011 | 04:59 PM
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Re: O2 sensors ???'s

There are 4, 2 precat and 2 post cat. Is your SES on?
Old Jul 5, 2011 | 05:07 PM
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Re: O2 sensors ???'s

Check engine light comes on sometimes and when I had it checked it said O2 sensors.THANKS
Old Jul 5, 2011 | 05:12 PM
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Re: O2 sensors ???'s

Originally Posted by dickeymoore
Check engine light comes on sometimes and when I had it checked it said O2 sensors.THANKS
If its a code for all 4 its probably a dirty MAF.

Get some MAF cleaner at the parts store and get her done.
Old Jul 5, 2011 | 05:35 PM
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Re: O2 sensors ???'s

Doubt you'd get codes for all 4 sensors at the same time. Next time it happens have them read and post, don't worry about the description. You can get rear 02 codes and has nothing to do with the sensor(s).
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