because your monitored cat is on/right under your manifold. the one farther down the exhaust is not monitored.
you have one 02 sensor in the manifold, and the other some where after closely after the cat thats attached to the mani. thats the monitored cat and the one that is bad.
theres the problem. im willing to bet you do not have have a 02 sensor after the cat in your cs exhaust. because the only monitored cat on the car is the on attached to the manifold. you have a 02 sensor in the manifold and one somewhere after the first cat because the first one is the only one...
question, how many cats are on the car? i was under the impression you car had one in the manifold and then you had one welded in to your cs exhaust as well?
these tires are awesome. we do them alot on more of the "higher performance" cars that come through my shop. Acura TL's and RL's, civic si's and one of the techs has them on his evo as well as on his 2.5 rs imprezza.
x2 on the left hand drill bit or even a tiny philips head screwdriver you can almost always get them to turn. i work at honda and they break all the time and we always extract the stud for free. your dealer is raping you on that for sure.
high flow cats are typically not as effective as the cats that come from the factory. how soon after the exhaust mods did the light come on.? id say do non fouler cel trick everyone else does and youll be alright. if the o2 sensors were getting "lazy" it would throw a slow response code. its not...
are you checking the tires cold, hot tires will read higher pressures. what was the other tire set at? i know guys at my dealer dont always set pressures on the sticker but anywhere between 31 and 35 is acceptable for passenger cars. did you happen to have the car loaded when you took it in...
agreed, when mommy and daddy buy it theres not much really you can do.
with that being said, save you money and buy a buy another car you can build and mod all you want.
i dread the day that i have to get a family car or one thats more practical. my only 2 rules in my car are 1) dont touch the radio and 2) no carseats/kids lol
anyways, congrats on the new ride and staying in a mazda