Question about 1999 Chevrolet Blazer
code p0404 exhaust gas circuit a and p0101 mass air circuit a problem. what is circuit a
P0404 is egr flow range, remove and clean egr passage way, it maybe built up with carbon, p0101 remove and clean mass air flow sensor. you can buy the cleaner at any auto parts store. but be carefull of the inside of sensor, follow directions on can. this should help a lot!!
Posted on Aug 22, 2010
When your catalytic converter is pluged, it will not let enough air pass threw maf causing that code. Also the back pressure will cause the egr to open when it's not supposed to causing that code. If you are lacking power pull out o2 sensor and take for a ride. Should notice increase in power. Change cat conver and u ready to go.
Posted on Jun 29, 2012
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Posted on Jan 02, 2017
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