oil levels on 1991 Toyota Previa

it seems that my oil light turns on but it`s not low dip stick is over flowing and reserve tank keep pumping oil in engine

Asked by for the 1991 Toyota Previa
could be your oil light sensor located on your block faulty test that
1 more answer
The oil level sensor is malfunctioning. It locate on the oil pan. You just need to change that sensor, then it will be fine.