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O2 sensors 850

Hi,
How would i know if my O2 sensors are bad. i don't get codes but i still want to make sure they are in normal if not good operating condition. Is there a DIY procedure to do it or do I need to get those OBDII scan tools? My gas consumption is not that great.
thanks






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New O2 sensors [850]
posted by  baneps  on Fri Mar 4 16:19 CST 2005 >


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