Volvo S70 emissions

Hi All,

I have a 1999 Volvo S70 AWD Turbo that I just bought. The car has its check engine light on and is shooting out the following codes: P0036 (HO2S Heater Control Circuit Bank 1 Sensor 2), P0135 (Bank 1, Sensor 2), P0014 Exaust Camshaft Position Timing. When the car idles it throughs out a lot of smoke of a whiteish color, it comes in big puffs everytime the car is stopped.


I took it for inspection and the only code that failed my emission test was the P0036.

What do you guys think the problem could be? What parts are needed?

Thanks for all the help, im new to this site