Many thanks to all the info posted, I had this warning on my a5 petrol 67 plate and it was the easiest fix I have done, took less than 5 minutes. I looked at the video posted on you tube and the only issue that I thought I would have was the air escaping when the sensor is removed as I thought it may have to be re-pressurised but having spoken to someone regarding this I was assured the servo would do its job which it did, I used a proper Audi part which cost £85. Audi wanted the car for a day to put on diagnostics at the usual exorbitant costs. Once again thanks to all, saved me wasting m6 time and money.
