Quote:
Originally Posted by blue62
. Your AOS is not or has never been faulty.
What year is the car and how many miles??
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It is a 2001 S with 125k, AOS replaced at 58k. Possibly it is failing again and fouled the cat. Not sure that would only affect one bank and not the other. Checked o2 voltage and bank 2 sensors are chasing each other, post cat voltage is wave between .15-.75v.
Bank one looks ok, post cat voltage pretty flat at about .68-.72v.