ESP light on my VW golf ?

I juz recently bought a VW golf and the ESP light is on on the dashboard and the ESP OFF button dosent work as well. I went to get it checked at the garage where I bought the car and he said the wheels were not the standard size for the car. I had 225mm tyres which was already there when I bought the car. Does the wheels affect the ESP light?? Nothing is wrong with the ABS it's just the Skid line mark iluminating on the dashboard.. And also when doing the diagnose test there was a fault which said brake pressure sender something...??

Do u have any suggestio??

Robin
November 2012