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O2 sensors???


89blaze's Avatar
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Join Date: Jan 2003
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03-29-04, 02:24 PM   #1  
O2 sensors???

99 chevy blazer with the 4.3L V6 with a little over 100,000 miles. I am going to do the tuneup soon and want to know about the O2 sensors. How do you "check" them or is it a good idea to just replace them? I would not ask this about my 89 burban, but it has only one at $30 unlike the blazer which has 4 at $100 a piece-so says the partshouse site, haven't looked yet, it scares me...

 
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davo's Avatar
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03-29-04, 02:46 PM   #2  
I would leave them alone if something is wrong with one the powertrain control module should kick the ses light on.Not a maintenance item like the older vehicles.

 
89blaze's Avatar
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03-29-04, 03:02 PM   #3  
Thankyou. That would make for some expensive tuneups...

I assume from your response, no electrical items should be touched in an OBD2 system unless the computer asks you to.

 
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03-29-04, 03:19 PM   #4  
That would be correct but I would change the cap, rotor and wires at that mileage unless done recently.You have been here long enough to know the rest of the list.

 
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03-30-04, 04:05 AM   #5  
Yup Yup, thankyou.

 
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