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Repeated O2 code?

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Old 10-12-2011, 07:47 PM
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Repeated O2 code?

About a month ago I bought a 05 rx8 with 78k miles and after a week I got a o2 code. Replaced the sensor and it popes up again. This time I replaced the plugs and wires. It ran good for a few days but on my half hour drive to work my engine light popes up again. So i pulled in to a gas station and called my mechanic. But I had to wait 30min before it would start. And now every time I pull up to a stop sign it idles low an occasionally shuts down. I have no idea what's causing this. I was told to use 91octane and the guy before me used only synthetic oil. Plus there is a cherping sound when I start to accelerate. I make a few distance drives a month but usually it small town driving and half hour to and from work. Does anyone know y the light keeps popping up. And What should I look for to fix it?

Thank you
Fetsch
Old 10-12-2011, 07:52 PM
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you need to have the codes read. Without them, it could be a number of things...
Old 10-12-2011, 08:10 PM
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Every time it reads post catalyst lean. Same code before and after new sensor
Old 10-12-2011, 08:14 PM
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If you get the actual code, that would help.

Possible issues:
plugs/ coils/ wires not installed properly
eccentric shaft position sensor
O2 sensor
Leak in system
low compression
etc
etc
Old 10-12-2011, 08:37 PM
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P2096. Is what my mechanic said
Old 10-12-2011, 08:39 PM
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Well dang now he thinks it's 3027. I'll have it hooked up when I get a chance
Old 10-12-2011, 08:40 PM
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Time to pull you cat an check that it isn't melted or clogged. That should have been your first step.
Old 10-12-2011, 08:45 PM
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3027? That's a new one for me
Old 10-12-2011, 08:48 PM
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Ok I'll do that. Plus I read that the coils only last 20k and I'm thinkin I'll check mine.
Old 10-12-2011, 09:35 PM
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3027 might not even be one. In his defense when I asked him he was juggling kids and a 390 install
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