High oil temperature.  Simplest answer for a 200K miles engine with a history of low oil pressure is bearing wear.

---- Dan N <dn92610@GMAIL.COM> wrote:
> oil buzzer ON for these possible reasons:
>
> - wrong oil grade
>
> - wrong type/brand of oil filter
>
> - bad/defective oil pressure sensors
>
> - bad/defective oil pressure sensor connections
>
> - too much oil in the engine (3/4 on the dipstick is best)
>
> - too little oil in the engine
>
> - worn crankshaft bearing(s) (errr.. engine rebuild on agenda)
>
> anything else guys?

--
David McNeely