ussally the oil sender (pressure ) will go out first.you replace both oil level sensor and sender. If its check engine with low oil pressure it could be from running to thick a oil,and it shears off the teeth on the oil gearing.This clogs your oil screen.

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran,you are a citizen of the world, all peoples are
cousin's, love all life, your love is enternal