problem found and fixed...first i want to thank you for all your advise.you were a big help in my troubleshooting and ive learned alot that i wouldnt have if not for this site. i googled o2 sensor code still comes up and while i read everything i could i learned that theres an o2 fuse in the fuse box by the steering wheel.it was the root of several others problem of reocerring o2 codes. so i checked mine and found it missing. replaced it and light hasnt come on since.this may help others that may not have thought to check out all fuses related to their problem.. again , thanks for being there when we needed you...douglas