Oxygen sensor

2004 SATURN VUE
90,000 MILES • 6 CYL • FWD
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NECER
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saturn 2004 Vue check engine light reads oxygen sensor
where is that and what does it do
how much to repair/replace?
Nov 23, 2010 at 5:53 PM
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SATURNTECH9
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If i could get the code number that your computer has set it would really help.You have like 4 o2 sensor's two upstream and two down stream.They tell the computer how rich or lean your engine is running.
Nov 23, 2010 at 6:04 PM
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BSCHURR
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also if the o2 sensor themselves are not bad then it could be something upstream in your engine that could be the problem & the 02 sensors are alerting you.
Nov 23, 2010 at 6:47 PM
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