Intermittently, the oil pressure light flickers on when I’m driving.
Sometimes, it flickers on when the RPMs drop in the range of 500-600 at traffic light and other stops. Most of the time, it does not come on at all. Yesterday, for a short while (one 15 minute trip), the threshold seemed to be closer to 1,000 RPM. But, after that, it never came on again for that day. This has been happening intermittently for the last year or so, roughly 25,000 miles.
The oil level is in the nearly full range, with around 1,000 miles on the most recent oil change.
I asked my mechanic about this once a few months ago. He thought the idle control valve might be acting up. But, the thing that is bothering me is that flickering does not seem to be related to the idle speed.