Question about 2000 Chevrolet Prizm

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Check Engine Light on 2000 Prizm

The code is 171..lean...not burning oil but heard these cars with high mileage tend to burn oil. tks. Rex

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As I mentioned, I pulled the MAF sensor and cleaned it with brake fluid, reset the codes and ran well and still running well, except the check engine light came on in 30 days, not immediately. It was only running the car at 75 mph did the light re-occur. I can't believe it would be the oxygen sensor...wouldn't a problem show up immediately with the check engine light? And have you heard of any problem with oil burning in 2000 prizms? Tks. Rex

Posted on Nov 13, 2008

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  • rexdoesch227 Nov 14, 2008

    I was told to use brake fluid by a mechanic to clean the MAF.

  • rexdoesch227 Nov 14, 2008

    And I was also told by this mechanic that most check engine lights are not due to the oxygen sensor, which seems to be corroborated by others on the net. And that the culprit might be a vacuum leak. Rex

  • rexdoesch227 Nov 14, 2008 was brake only has 50,000 oxygen sensors go bad that soon?

  • rexdoesch227 Nov 14, 2008

    Also, what damage occurs to the engine or catalytic converter by running the car at lean (171 code). It seems that I am getting better mileage since the code came on.....and I can probably pass emissions by resetting the code (pulling the neg. battery cable), since it runs for weeks before check engine light comes on...tks, rex


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Most likely replacing the O2 sensor will fix this code, but that is not 100%, it could be other issues like a vacuum leak or a MAF sensor. The O2 is the one in front or on the engine side of the catalytic converter.

Posted on Nov 13, 2008

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  • yadayada
    yadayada Nov 13, 2008

    Why the thanks for trying, the info I provided was correct based on what you wrote in this thread/post, I have no idea why you think I would know you cleaned the MAF, and cleaning the MAF is not always the problem, many times the sensor is defective and no amount of cleaning will cure that, O2 sensors cause intermittent check engine lights more than any other sensor, that is based on 20 years of almost nothing but emission repairs, I was a unlimited Smog tech for the state of calif for 30 years, what I have told you so far is correct. The Thanks For Trying is unfair

  • yadayada
    yadayada Nov 13, 2008

    Oh, no I have not run across a real oil burning concerns with this car, but they are a Toyota Corolla and perhaps you should research those cars, they are the by far much more numerous.

  • yadayada
    yadayada Nov 13, 2008

    Why did you use brake fluid to clean the Manifold air meter??

  • yadayada
    yadayada Nov 14, 2008

    Lets se how would you account for 3 or 4 thousand O2 sensors I have replaced for phantom lean codes? No, the other techs are wrong, vacuum leaks are easy to ID, you spray carb spray around the intake area and if a vacuum leak is present then the O2 will go to a high voltage reading, if nothing happens then the O2 is defective and does not switch up and down as fuel trim is adjusted, are you sure the mech didn't tell you to use brake clean, not brake fluid?

  • yadayada
    yadayada Nov 14, 2008

    You read blogs I worked as a class A smog tech for 30 years, I do know what I am talking about, I have decades of field work to prove it.

  • yadayada
    yadayada Nov 14, 2008

    No damage to the cat will occur, a very rich condition will burn the cat out from overheating, but they like lean. What about doing the fair thing and changing the rating.


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