Hi all, I tried the search button as thought this would be a common thing but cannot find anything relating to my problem. Basically had some new front tyres fitted a few weeks ago and since then the tyre pressure monitor has being playing up all the time. I chose "wheel change" and "store pressures" when I fitted the new tyres and basically since then sometimes when I drive up the road I get the warning symbol for a flat tyre, but will not tell me which tyre. I have checked the pressures in all 4 tyres but seem to be fine, could this possibly be a dodgy sensor/flat battery? I tried calling my Audi Dealer but they are about as much use as a chocolate firegaurd as I didnt buy the tyres from them (I paid £180 as opposed to the £270 they wanted!!) I think it could possibly be related to the cold weather we are experiencing at the moment but as its the first winter I have owned the car just want to check to be safe.