Question about 1987 Volvo 740

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Failed emissions inspection - NOx sensor fail

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  • yadayada
    yadayada May 11, 2010

    what are all the gas readings?

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Unscrew the Ox sensor and clean the tip with kerosene and dry. If result still negative, replacement is required.

Posted on Oct 09, 2009

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SOURCE: Our 1991 Toyota Corolla failed

yes the cadallac converter produces nox emissions i would say the cadallac is on its way out

the caddalac is on the exuast

Posted on Jul 29, 2008

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Thousands of technicians have faced the challenge of bringing a particularly stubborn application into compliance for NOx emissions. High NOx readings are a clear sign of performance issues somewhere in the system. The question is, where?
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Please note that while a failed catalytic converter will contribute to high NOx readings, the failure in itself may have been caused by some other upstream performance problem. In all cases, it is crucial to identify the root cause of the problem before blaming the converter.

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