Well, for most of the winter and part of this spring. I had Bosch O2 sensors in, Because I replaced my OEM ford O2's for some Bosch's because my car was running pig rich and was sputtering ALOT, at the time I thought it was faulty O2 sensors. Well that problem turned out to be a bad TPS(throttle position sensor). Well I have long tubes, full exhaust, no cats etc. I had been getting Bank 1 Sensor 1, and Bank 2 Sensor 1 "CKT slow response" codes for a while. I Couldn't figure it out. I reset my ECU several times, and 15-20 miles later the same codes would pop back on. Well about a week ago I realized I still had my OEM ford O2 sensors laying around that I assumed were still ok. I never put them back in, didn't think it would matter what O2's I had in there. Well I swapped them out finally just to see, 50 miles later, no codes, smoother idle! A day later I sent my ECU off to T&J peformance to get it reflashed for a few things and after 150 miles, no codes. So after this, I have come to the conclustion that Bosch O2 sensors just blow! ESPECIALLY if you have long tubes, they don't respond and read how they should. just a heads up, stay away from Bosch.
Blake
Blake