P0523 Engine Oil Pressure Sensor Circuit High Voltage On Sons 2008 Alpha

[lfootmatt]

Is this a simple case of a dead or dying sensor? Sounds like its sensing increased resistance or even an open circuit where it is not supposed to be.

Anyone else see this? I searched but could not find this description.

Thanks in advance!

Matt

 

[alrock]

First time I recall seeing that here. I can't speak to the Alpha, but it's a pretty easy swap on the I5 and not expensive. I've swapped mine out a couple of times.

 

[JPaul]

Some things to check: https://www.obd-codes.com/p0523

This one talks about the filter screen they had in some years, not sure if the H3 had them or not. I know mine didn't.
https://www.gmfullsize.com/threads/p0523-and-0-psi-oil-pressure-fix.307762/

So first steps are check your oil level, then try an oil change with good oil and filter, then if that doesn't help it's time to check the sensor itself and probably just replace it. They aren't expensive and it's not too bad a job to replace the sensor on our rigs once you take the vanity cover off. Also check the wiring a the back of the block to make sure it's not getting rubbed through somewhere like mine was.

 

[rascole]

The oil pressure sensors on the 5.3 is an easy fix and cheap. I have replaced several in full size GM.