Question about 2002 Pontiac Grand Prix

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Failing smog computor says cataletyc not ready it has a knew converter

Smog says cataletyc not ready ,i have a new cataletyc convereter

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  • mark schleck May 11, 2010

    how long &what speeds have you driven how much gas is in the car is the check engine light on does it have a temp guage,is it running at normal temp all these things have to do with enableing criteria to run the catalytic convertor monitor.thanks from schleck

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Check the oil level, to much can ruin catalytic converter. Check O2 sensors with scanner, make sure they are work accurately. Check air box while car running, apply aceteline gas with no flame, recheck scanner for O2 sensors flucuatation. Compare all sensors for flucuation of 1mv to 9mv. If sensors flucuate they are good, if no flucuation sensors need to be changed. recommend to change cat with bad sensors. Before changing cat check for bad pressure.

Posted on Sep 03, 2008

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