Low coolant light on,resevoir full,has been removed,cleaned,re-installed,no help,does this sensor come off or do you have to buy entire new resevior. this is a duratec 24 valve D.O.H.C.

Try this first. With the reservoir full and the engine running tap the reservoir with a rubber mallet repeatedly. The key word is tap (you can get a little aggressive). try this for about 5 minutes or so. If the light goes out problem solved. More often than not this will work.

If that doesn't work the reservoirs are available aftermarket for about 50 dollars and come with the low coolant sensor. I have installed several of these and most of the time they work just fine. Every once and a while I will get one that doesn't seal up correctly.

I would highly recommend calling your local ford dealer to see if the low coolant sensor is serviceable (i don't think it is) and if not replacing the reservoir with an O.E. one from ford.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

YOU CAN REPLACE LOW COOLANT SENSOR ITSELF. WITH OUT REPLACING THE WHOLE EXPANSION RECOVERY TANK.