I had this problem earlier this year with my car. Parked it up straight away and trailered it to my local specialist who tried changing the sensor which did nothing. He then dropped the sump and found the pickup pipe was badly blocked, did a full engine flush and scrubbed all the crap out of the sump, changed the oil and filters and it's been fine ever since
For reference, my car is an 06 GTI with about 48,000 miles on
Matt