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1990 Buick LeSabre Question: I have a check engine light that came on. The dtc 65 is showing.

 

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KeDavis115, New Castle, IN, February 16, 2014, 12:20
 Rookie

The check engine light came on showing dtc65. I looked it up and it said "Right bank O2 sensor rich exhaust indicated" Have any what that means? Thanks.

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    G. T. Service Center (4228 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG February 16, 2014, 13:36
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     Master

    It means that o2 sensor is reading more fuel then air and the fuel mixture is not correct for efficient operation.

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    KeDavis115, February 16, 2014, 13:54
     Rookie

    How do i correct this issue? Is it something a rookie can do?

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    ProfessorG, February 16, 2014, 14:02
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    When I was a rookie, I didn't know how, but several years later and updated equipment helps. Google the code and there should be something to help you understand what causes it, what to check. Could be an EGR, air filter, leaky fuel injector, etc.

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    KeDavis115, February 16, 2014, 14:43
     Rookie

    Ok. Thanks for your help. Time to do my homework.

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    ProfessorG, February 16, 2014, 14:45
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    Good luck, ask again if you need to.

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