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Old 08-28-2006, 11:54 PM   #1
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Default O2 Sensor Code

Did a routine maint. on my '91 Olds Regency Elite. Replaced plugs, wires, filters etc.... Also replaced the O2 sensor, and because it had been idling rough while cold I replaced teh temp sensor. After I did all this I began noticing that if the car sat still at idle for more than 3 or 4 minutes the check engine light would come an, and the engine would begin to stumble a bit. I checked the codes and it came back to a low voltage on the O2 sensor. Thinking the O2 was bad, I replaced it again.....to no avail.....it still does the same thing. I've never seen it do this before in all the years I've had it. Any thoughts anyone?
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Old 08-29-2006, 12:57 AM   #2
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I would say that you need to have a scantool hooked up to the car to see what reading the PCM is getting from that sensor...

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Old 08-29-2006, 05:57 AM   #3
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what brand o2 did you install?

is the connector dirty or corroded?
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