2008 Audi A3.I have the word SAFE over my mileage counter. Low oil pressure light was coming on even after oil change and sensor replacement. The car stopped while i was driving it and now won't start

SOURCE: 2000 Audi A4 quattro with abrupt gear shifting & low oil pressure

I hope that you had the proper weight oil installed, at your oil change. If your oil is up to the proper level, and it's rattling ,this is VERY bad. White smoke usually means steam in the exhaust, and that means a blown head gasket. Check your coolant level. I wouldn't drive it anymore......until someone knowledgeable can diagnose it!!!!!

SOURCE: STOP ENGINE-LOW OIL PRESSURE LIGHT COMES ON AFTER INSTALLING NEW

Before making any repairs I suggest you put an external mechanical oil pressure gauge in place of the sending unit and determine what your actual oil pressure is. That will tell you which way to go using real numbers. If this condition appeared suddenly it may not be a large problem, especially as you did not note any knocking etc that goes along with internal wear.

SOURCE: Replacing Oil Pressure Sensor.

Usually near the filter.

SOURCE: LOW OIL PRESSURE ON 2007 GMC SIERRA 1500. CHANGED

have it tested using a manual gage if still low then main baring ore most likely bad that would mean a over hall if is really low and bearings bad should be making rattle noise when started up first few seconds

Testimonial: "thanks alot.truck is not making a rattling noise.we did check it with a manual gauge.it read about 10 at idol. press. gets better as you incr speed"

SOURCE: A light comes on in my car that says oil pressure

If the light is only turning on during acceleration or deceleration and then goes off, this is normal. If the light is constant, and you are sure you have oil that is up to the "full" or "max" level on the dipstick while hot, then it might point to a faulty oil pump or worn gaskets that will no longer prevent the oil from staying in place in the engine. Is this light accompanied by a check engine light. If so what is the code. You may also have a faulty oil sensor. Hope this helps