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P0431 - 2001 Mazda Milenia w/o supercharger
The issue I am having is:
originally my car failed emissions with a few of codes....P0400:EGR Flow, P0421:Warm Up Catalyst Efficiebcy Below Threshold(Bank 1), P0431:Warm Up Catalyst Efficiebcy Below Threshold(Bank 2).
I fixed them, by cleaning the egr valve, and clearing the ports just behind/inside of the throttle body. then car ran/runs great....this morning(3/22/10) I was going to finally take the car in to "pass" the emissions test and the check engine light came back on....I went to AutoZone and they checked the code for me now a P0431 comes up again...any tips would be greatly appreciated!! there doesn't seem to be an exhaust leak and I hope the catalytic convertor isn't bad.
originally my car failed emissions with a few of codes....P0400:EGR Flow, P0421:Warm Up Catalyst Efficiebcy Below Threshold(Bank 1), P0431:Warm Up Catalyst Efficiebcy Below Threshold(Bank 2).
I fixed them, by cleaning the egr valve, and clearing the ports just behind/inside of the throttle body. then car ran/runs great....this morning(3/22/10) I was going to finally take the car in to "pass" the emissions test and the check engine light came back on....I went to AutoZone and they checked the code for me now a P0431 comes up again...any tips would be greatly appreciated!! there doesn't seem to be an exhaust leak and I hope the catalytic convertor isn't bad.
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Comments
i'm going to take it up to meineke for an exhaust test to make sure the cat conv is good. also, my o2 sensors have never been replaced (i'm at 102K miles) and they are recommended to be replaced every 100K. so hopefully the cat conv is good and after doing some research replacing the rear left hand O2 sensor may clear the code (see this). i'll let you know how it goes. BTW, found these DRIVE MODES to ready the system monitors once you do your fixes >> http://codes.milleniatech.net/info/