Oil problem Can anyone explain

[Donzo]

Originally posted by DREDIOCK
First thing I did when the problem started was have the oil and filter changed.
Wasnt overdue but I had it done anyway.

Same thing. Then the pump
Same thing

Now if I start it the presure is fine...at first.
and holds good for a while..like an hour before it drops again

but the Check engine light is now lit reguardless of oil pressure

If you don't have a code reader, I think you can have the codes display on the odometer readout.  This page  has some instructions on how to get the codes to display on the odometer readout by turning  the key on-off-on several times.  This works on my 2002 Caravan.
Once you have the codes you can look them up.  I'm thinking that there's a good chance that all you'll get is a code telling you that you have low oil pressure.  (duh).  But there might be other codes that point to what the root cause of the problem is.  
Give it a try...what-cha got to lose?

[DREDIOCK]

Im gonna drop it back off at the mechanic on monday.
As he cant do anything with it till then anyway.
Figured I'd ask here to get some ideas

The check engine light is lit now even when it has good pressure.

Im no engine Guru. Especially with these newfangled things. I gave up mechenecking long ago.
But this is the weirdest thing I'd seen in a while

[Masherbrum]

Soinds to me:

1.  Sending Unit
2.  Pickup in Oil pan may be too close to the pan allowing decnt, but not adequate flow of oil.

My money's on the sending unit.