It looks like you're new here. If you want to get involved, click one of these buttons!
P0431 - 2001 Mazda Milenia w/o supercharger
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.