Question about Pontiac Sunfire

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1998 pontiac sunfire failed emissions no voltage

Failed emissions, said no voltage- can not get a reading. The check engine light was on, but we replaced the cigarette lighter fuse, and the light went off, took back to emissions, and it still failed, any suggestions on what else could be causing the problem? I took it to autozone, they couldn't diagnose it because when they put in the tester, they can not get a reading back, the tester said to check the connections. What can be the cause of this? no voltage issue? please help, thanks

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  • Jeanne Williams
    Jeanne Williams Dec 31, 2013

    I apologize, but I should have provided the following information in my original question- that is that the inspection report shows everything as *pass, except for the following... OBD readiness monitor status: *unavavailable, did not communicate, OBD connector integrity: *Fail, Malfunction indicator light (mil) status / No Voltage: *Fail. Under the diagnostic trouble code report area it states the following: Your vehicle reported no voltage at the data link connector (computer connection). With this additional information that I provided would it change your recomendation at all? (checking the lambda sensor and/or cat). I appreciate your help immensley! Your very kind..Thanks so much

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Hi jeanne this sounds like the lamda sensor's are falty and or the cat have these checked

Posted on Dec 31, 2013

Testimonial: "Fast response! Excellent advice."

  • Jeanne Williams
    Jeanne Williams Dec 31, 2013

    I apologize, but I should have provided the following information in my original question- that is that the inspection report shows everything as *pass, except for the following... OBD readiness monitor status: *unavavailable, did not communicate, OBD connector integrity: *Fail, Malfunction indicator light (mil) status / No Voltage: *Fail. Under the diagnostic trouble code report area it states the following: Your vehicle reported no voltage at the data link connector (computer connection). With this additional information that I provided would it change your recomendation at all? (checking the lambda sensor and/or cat). I appreciate your help immensley! Your very kind..Thanks so much

  • Jeanne Williams
    Jeanne Williams Apr 01, 2014

    Ended up being a fuse- for the horn slot

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