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Re: NOx Failure, O2 Sensor , and the Vantage
Posted to Emissions Forum on 12/27/2006 1 Reply

I would check precat NOX (just one more piece of info)if around 2500 or less I would be looking for exhaust leaks ,which Lambda would seem to rule out,next I would check cat Quality.I would be happy with the O2 sensor test results. My .02 Login to read more.

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