[1lowufo]

I have an 06 non turbo with 55.000. Changed plugs and wires today. Was out on the Turnpike and the 'check engine light' went on. It went on along time ago, and I found it was the gas cap. I stopped and checked the cap again, but the light stays on. I ran the codes and found 0138 (HO2S circuit high voltage bank1 sencer 2) and found 0139 (HO2S slow responce bank 1 sencer 2). What the heck is this ? Did I do something when I changed plugs and wires? Car runs great! Don't have the time to take it to a dealer, can I replace anything? Thanks for your help!