Sporadic oil light at warmed up idle, then a check engine light

[BobMarley1]

My car flashes the oil light when idling, engine is warm. When it is cold it doesn't, due to the higher rpms.

What is the rpm for idle, warm engine.

I checked the oil level, it's fine. I disconnected the battery to get rid of the check engine light, and it hasn't returned, but the oil light still pops on occasionally.

Yes, I searched.

Any ideas?

Thanks!

[JFP in PA]

Yeah, disconnecting the battery without bothering to find out what the codes were was a really bad idea..................

[CJ_Boxster]

Well your going to have to take it to a mechanic, the CEL could have toldyou the possible issue and weather not its something that can harm your engine or if its a sensor or bad lead to a sensor.

[BobMarley1]

Okay, well hopefully the cel will come back on, then I'll take it in.

thanks!

[Steve Tinker]

In addition to what specific readings the CEL is going to tell you, low oil pressure warning light illumination is usually caused by:
Oil grade too thin.
Worn engine bearings.
Worn oil pump.
Faulty oil sender unit.
Idle revs too low (should be approx 800rpm)
If you have low oil pressure @ normal 800rpm, there is a good chance that you have low oil pressure at all revs.
The only real way to check is to hook up a mechanical oil pressure gauge to the engine to verify the correct pressures at running temps and revs. I wouldn't dismiss this potential problem out of hand, although an oil change with the correct viscosity oil is a good starting point. And check the oil filter internals for debris.....