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02 sensor issue really confusing me.... 700

posted by  Herb Goltz on  Thu Nov 25 08:15 CST 2010
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last visit: Fri Oct 24 13:23 CST 2014
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What is the voltage reading? It might be that you aren't seeing swings because you are pegged at rich or lean. The O2 sensor just tells you what it "sees" in the exhaust gas. If the oxygen level in the exhaust gas is constant, the reading will be too. With a failed fuel pressure regulator (for example) you would see rich running all the time, so the O2 sensor will reflect this bias.

To me this probably means that the O2 sensor code is a symptom rather than the cause of your problem.

I'd be on the look-out for things like a failed fuel pressure regulator, a bad coolant temperature sensor or a vacuum leak. Any issues with how the car runs?

Good luck!






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New 02 sensor issue really confusing me.... [700]
posted by  RobCooper  on Thu Nov 25 04:52 CST 2010 >


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