My check engine light came on shortly after the first part of the day, and I retrieved codes P1421 and P1423, Manufacturer Controlled Auxiliary Emission Controls Bank 1 and Bank 2, respectively. I was wondering if anyone knew or could shed some light on what this could be? I reset the code, and it stayed off the entire time the car was warm. The next day, the same thing happened. It has no effect on performance, other than a slightly unstable RPM during the first 30 sec. of running.
Is the Secondary Air Pump hangin' off the right shock tower about to kick the bucket or what? Or....maybe it already did...
Not many people seem to know what these codes really mean, any help would be greatly appreciated.