what does code P0008, and P0017 mean.

What is your question?

i bought vehicle with check engine light on. was told all i needed to do was change co2 sensore. but i went to auto zone and they told me to get an oil change, but i had an oil change a month ago, had secondary timing chain done, and it still hasnt fixed it. do you think co2 sensor will fix it. i already had brakes and wheel bearing changed already, cuz it needed it, also.