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Oldsmobile Forum: keep getting o2 code. replaced it 2x's. cant pass emissions.
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Old August 28th, 2017
redrum55 redrum55 is offline
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keep getting o2 code. replaced it 2x's. cant pass emissions.

My 95 olds 98 regency elite with 88k has an obd2 plug for some reason. Every time the check engine light comes on recently is has the 02 code. I replaced it 2 times already. By the firewall. I was wondering if there was a downstream o2 im missing? I looked around my cat but there is no sign of it. Or wires dangling. Replaced ing. control mod. And Mass air flow sensor. Tune up was done about a year and a half . but it only see about 2000 miles of road a year. I need to pass emissions since my plates are expired. Live in northern indiana. Usa... Any help would be great.

Last edited by redrum55; August 28th, 2017 at 09:52 AM.
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