How is that the simplest answer? I prefer a correct answer in any case.

Far more commonly with 86+ vans the cause is something other than actual
low pressure due to engine wear.

The best answer is to determine what the actual cause is. Analyzing the
particulars is the place to start. Since the problem abruptly started
after dash work the problem is more likely in the dash area rather than
inside the engine. Also when the cause is inside the engine it tends to
show first on a hot engine and after a long drive. The OP described it
has happening immediately on driving it after the dash area work, before
the engine had a chance to heat the oil very hot.

Mark

Dave Mcneely wrote:
> 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
>