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21 Aug 2011, 08:21 pm
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o2 Sensors Replace?
Just curious on how many of you change the upstream or down stream o2 sensors and at what mileage? If changed, what was the reason? Routine maintenance or actual fault code?
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21 Aug 2011, 08:24 pm
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Re: o2 Sensors Replace?
Changed both for routine maintenance at about 99,000 miles. Never had a fault.
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21 Aug 2011, 08:48 pm
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Re: o2 Sensors Replace?
Quote:
__________________
Joel  2001 PT Cruiser 5-speed; 1976 Oldsmobile Cutlass S; 1990 Chevy 454SS; 1995 Caprice Classic woody www.rcktpwrd.com
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22 Aug 2011, 09:38 am
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Re: o2 Sensors Replace?
Yep changed the one before the cat, bad fuel mpg's, way better afterwards!
it was acting lazy on scanner!
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22 Aug 2011, 10:56 am
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Re: o2 Sensors Replace?
I think I'll change the upstream today. When at running temp the engine feels a bit sluggish. Car has 107,000 miles and PO never changed either sensor. Downstream is typically for cat effeciency and the upstream does all the work.
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