i'm almost positive i have a bad o2 sensor...well i ordered one off the internet...are bouth the sensor in the header and just beyond the cat the same type....if i replace one and doesnt fix the problem can i just put the old one back inn, then take the new one out and put it inn the other sensor spot...do you know what i'm saying?...
The answer to are they the same is..... depends on the year. let me know what exactly your driving and can definitively answer that.
Heres a better question why do you think youve got an O2S problem??? the pre and post cat sensors are used for entirely different purposes, and dont cause the same issues. In fact the most the rear(after cat) sensor can do is turn on your CEL. its technically just a monitoring device, not a control input.
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its 04 chevy cavalier with a ecotec...iv'e gotten CEL saying o2 sensor low voltage...bank 1 system to lean...and from this my car is dumping way to much fuel inn, and i'm getting like 10 miles to the gallon...also everynow and then probly 3 or 4 times a drive i get multiple misfires...if checked my spark plugs, checked the gap, put in fuel injector cleaner the last two times i got gas, changed my oil and filter, its been like this for awhile now...
no both are NOT the same i had both of mine replaced in my 98Z and Header was 40 and the Cat was 120ish.....
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I already spoke with Mark privately on the subject, and on the '04 they are the same Cavgold. Your car doesnt use a heated sensor in position one Cavgold thats why there is the large price diff.
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Brad,
Seen your reply to another o2 sensor question. Thought you might be able to help with mine. I have 98 2.4 cavavlier. Is it possible for the 02 sensor to short out and cause poor running conditions? 1st thought i might have had clogged cat converter , because it was cherry red last time i drove it. I have cleaned cat out. Car idles ruff and like its starving for fuel. Still smells real rich like its getting to much gas. Maybe Icm is bad. I have replaced that already. I had replaced 2nd bank 02 sensor already once. Thought about puuting in 02 simulators but the dont make them any more. Any idea....................????
Andrew
Another day in the life of a J-body Owner has come upon us
