camlex Posted May 2, 2005 Share Posted May 2, 2005 Hello, Most time i read people gets engine light on dashboard and run dia. test, gets error codes and they changes O2 Sensors. Also people says you are not getting enough gas mileage check O2 Sensors. Can somebody explain me the relation. Quote Link to comment Share on other sites More sharing options...
SKperformance Posted May 2, 2005 Share Posted May 2, 2005 One guy said clean the maf wire instead of replacing the o2 sensor. Quote Link to comment Share on other sites More sharing options...
camlex Posted May 2, 2005 Author Share Posted May 2, 2005 SK, Thanks, So, O2 sensor get weak or they just go bad. Quote Link to comment Share on other sites More sharing options...
Lexusfreak Posted May 2, 2005 Share Posted May 2, 2005 They either work or they fail. B) Quote Link to comment Share on other sites More sharing options...
branshew Posted May 4, 2005 Share Posted May 4, 2005 Basically the O2 sensor reads the amount of oxygen in the exhaust gasses. Your ECU collects the readings from all of your 02 sensors, fuel delivery system and the MAF and it adjusts your air intake and fuel delivery to achieve the "optimum level" of oxygen in the exhaust. While I agree w/ Lexusfreak in theory that a sensor either works or it doesn't... I would say that a dirty and/or heavily deposit covered O2 sensor could have an adverse affect on your MPG. I think this skews the 02 readings enough and could make you run just a little bit richer. I would chack the MAF first though before you start replacing O2 sensors. It seems like a more likely culprit. Quote Link to comment Share on other sites More sharing options...
mburnickas Posted May 4, 2005 Share Posted May 4, 2005 Basically the O2 sensor reads the amount of oxygen in the exhaust gasses. Your ECU collects the readings from all of your 02 sensors, fuel delivery system and the MAF and it adjusts your air intake and fuel delivery to achieve the "optimum level" of oxygen in the exhaust.While I agree w/ Lexusfreak in theory that a sensor either works or it doesn't... I would say that a dirty and/or heavily deposit covered O2 sensor could have an adverse affect on your MPG. I think this skews the )2 readings enough and could make you run just a little bit richer. I would chack the MAF first though before you start replacing O2 sensors. It seems like a more likely culprit. ← I know my scanner can test the ohms and it tells you if there are good or bad. Quote Link to comment Share on other sites More sharing options...
dickholy Posted May 4, 2005 Share Posted May 4, 2005 hi, i had the same problem about two months ago. SteveJ gave me the properly assistance and my )2 problem had been solved. i think you can search the past topics about O2 sensors... there are 3 sensors in the car, the best way is to replace all 3 of them, because they have almost the same life, one is out, another 2 are colse, so... good luck!! :P Quote Link to comment Share on other sites More sharing options...
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