I have a 2000 Passat. It was owned by my aunt for 2 years w/14,000 miles (sat for about 1 1/2 yrs before I bought it.) Whenever the outside temp goes above 70 degrees, the oil warning light comes on. Have had it checked, sensors changed, etc., nothing worked. As soon as the outside temp goes below 70 in the fall, the light does not come on again until the spring. It is very annoying and some say I shouldn't drive it, but the oil is changed regularly and when they checked the oil flow, etc., they said it is fine. Can you help me?
The first thing I would tell you to do is see if you fall under the "sludge" problem that VW had a recall on.
The next thing is that VW can be very picky about the oil and filter. If you haven't been doing the oil change at the dealership, make sure that you request a German oil filter. If you go to the dealership for your oil change, then they are using this. These vehicles can be very finicky if the right oil filter and oil are not used.
I'm assuming that the pressure sensors are the ones that you have had replaced, this would be my next recommendation.
Good luck and I hope this helps.
〉 Answered on Mar 26th, 2007 by Lori Johnson, Owner and Instructor at Ladies Start Your Engines