Oil pressure question

Question

I am driving a 1995 Bonneville and, lately, whenever I am idle, at a stoplight for example, my oil pressure drops and my check engine light comes on. Any ideas on why this could be happening?

Answer 1

Sounds like your oil pressure is dropping at low RPM, which could be one of the following: low oil level, a bad oil pump, low viscosity oil, or worn bearings.

First step after checking the oil level is to check the oil pressure with a manual gauge.

Answer 2

May even be a failing oil pressure switch...