Help - Exhaust emmision Values sensor

[Charliebrowne]

Guys, only my second post in 2.5 mnths since I bought my second hand X-5. First time was 6 days after buying it and my air con started making a loud clicking niose. Turned out one of the fans had snapped - £350

Today I got the car cleaned proffesionally and when I went to move it, it was dead. Not the most of mechanical people but quickly determined it was a dead battery. Got it jump started and of she went. However all the warning lights were on. As I drove of they all started tot urn of except for the Exhaust emmision Values sensor. This is still on, can it just be coincedence? can the flat battery have had an impact ?

Any ideas I cant deal with another issue so soon after buying a low milage 2001 X5