you did not understand my Question. the reason i am asking is my an oil pressure signal keep coming up ,after a mechanic pure an excessive amount of oil in my car
The oil pressure warning light comes "on" when there is insufficient oil pressure and the engine will suffer damage.
That warning light is not designed to check the oil level in the engine.
Some cars did have an oil level sensor fitted with a gauge similar to a fuel gauge, others made use of the oil pressure gauge to show the level before the engine ws started.