Out of no where my oil gauge on the dash is constantly reading 0, but has fresh oil and filter. I was hoping that would fix it, but didn't. The engine sounds louder than normally. Like a mix between a weedeater and a sewing machine? Check gauges light came on, hooked a computer to it and got 4 codes.

p0102 (Mass Air Flow (MAF) Circuit Low Input)
p0113 (Intake air temperature sensor)
p1406 (EGR VALVE PINTLE POSITION CIRCUIT)
p0300 (Random Misfire)

I don't think either of these has anything to do with the oil pressure reading 0 and the car running and sounding like crap.

Is this a sign of a dead/failing oil pump or motor being shot?

It does have 190,000 miles.

It's a 97 v6 3.8 automatic.

 

check for plugged cat. check for shorted or damaged wires in the engine compartment.

 

First pull your oil filter, don't spill it out. Dip your finger in the hole and see if there is shinny specs in it. If there is a lot of specs you motor is most likely done for. Second would be to verify the zero oil pressure with an manual gage.