oil light comes on when braking on 2000 Ford Taurus

When I apply brake the oil light comes on

Asked by for the 2000 Ford Taurus
Most likely low engine oil level. Better top it off ASAP or you will need to buy an engine!!
Oil pressure is good. I have taken car to Ford several times and they cannot diagnose the problem. I'm wondering if other Ford drivers have this problem what solution, if any, they have accomplished.