Question about 2002 Nissan Sentra
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Posted on Jan 02, 2017
po420 and430 is telling that the catalyst converters are no good both, most of the time bad o2 sensors maake computer think cat is no good, the way it tests is if o2 sensor reading before cat is about the same as the one after cat computer asumes cat is not bruning exhaust good , iwould replace o2 sensors reset check engine light and go from there, that might be the problem,if you were to replace cat o2s should be done at that time,so do o2s first,good luck.
Posted on Nov 05, 2009
SOURCE: my 2002 nissan primera has
Hi, you may be running rich. Not sure which engine you have, and this car is not sold in the US, but if you have a vacuum operated fuel pressure regulator on the fuel rail, check it for a torn diaphram. See #2 at the following post: http://www.fixya.com/cars/r7427423-fix_poor_idle_high_idle_stalling_fuel
Posted on Jan 19, 2011
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