O2 sensors ???'s

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Jul 5, 2011 | 04:36 PM

dickeymoore

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Posts: 55

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

Jul 5, 2011 | 04:59 PM

2001NBMZ28

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Posts: 1,655

From: Jacksonville, FL

Re: O2 sensors ???'s

There are 4, 2 precat and 2 post cat. Is your SES on?

Jul 5, 2011 | 05:07 PM

dickeymoore

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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

Jul 5, 2011 | 05:12 PM

transamtom

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Joined: Mar 2001

Posts: 906

From: niagara falls ont. canada

Re: O2 sensors ???'s

Quote:

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.

Jul 5, 2011 | 05:35 PM

2001NBMZ28

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Joined: Jul 2001

Posts: 1,655

From: Jacksonville, FL

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).