I have a 1998 Chevy and my service engine light is on. PO157 CODE BANK 2 SENSOR 2?

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alb016

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I went to schucks and tested it and the PO157 code showed up. I figured it was my o2 sensor so i replaced them. Know i earased the system and everything, light went off. Now i was driving and the light came on again and i went back tested it again... PO157 Code.... any suggestions on what it could be?? Its running normal, only thing is the sevice engine light! Thanks
 
I assume you own a scanner with datastream capabilities. I'd hook the scanner up, go to live data, and monitor the O2 sensors, its pretty easy. This is exactly what you get for free code reads, parts places that make money selling you parts that never fix the problem. Reminds me of autozone. I would stop right now, and get it to a real shop that has professionals working there and get it checked by a pro.
 
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