Water pump doesn't work but there is no water leak it can be just a sensor problem?
No, but it could be the impeller inside the water pump, has come loose from the impeller shaft.
A leaking seal indicates that the bearing, or bearings, for the impeller shaft are bad.
I have replaced water pumps, (With a brand new one), and have had to remove it, and reinstall with another one.
Why?
Impeller is spinning around on the impeller shaft. The machining done was a bad job, and the impeller wasn't staked to the impeller shaft.
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