Code p0523 turned off and on again?

The code P0523 means the engine oil pressure sender/sensor is too high. This can be caused by the engine oil pressure sensor being bad or the oil pump pressure relieve spring is stuck and not allowing the excessive oil pressure to be bled off. I would try to change out the sensor first here is the location of the sensor so you can change it out in the images below. Please let us know what you find. We are interested to see what it is.

Deleted the codes and started it, this is what came back all at once.

What about the other codes? Those are common, I am sure but not sure where to start. Deleted them and the same ones came back, 1, 4, 6 and 7 like in first picture, very minor idle roughness as in i see the motor is a bit shaky.

Did you replace the oil pressure sensor?

No not yet. I thought it was minor, i pretty much see it on all of these cars when i scan them. Or do you think it's a big deal?

Oh Geez, is this the one behind the alternator? I ordered one but just looked at the photo. I drove the car after the ABS lights went off. It drives great but feels like it is shuddering, so I was going to replace the fluid, but then remembered that maybe this hesitation/shuddering is maybe due to the other MDS codes I have. Once I change the sensor I will see if anything changes, but is it possible that this is the case?

Can you give me the part number as some of them are the oil pressure switch and others are the sensor?

The oil pressure sensor points to the front of the car, the temerature sensor points to the right side of the car.

The disconnected one? It's not even plugged in.

Yep, that will do it, can you find the conenctor?

Yes.

What happens if you plug it back in? I would clean the sensor and connector.

I already bought one, don't want to plug it and put everything back together to find out sensor is bad. I'll let you know.

It was not even tight. So i replaced it and plugged the sensor. Also the other sensor by the oil filter was connected but also loose, tightened it. No leaks, connected battery and started it check engine light was on. Checked the codes and it was for the mds, deleted them and them did not come back yet. Motor revs good. No lights on so far.

So, i can at least delete them now and drive it but once i turn it off and on the same codes come back, the cylinders 1, 4, 6, and 7 inactivation.

I am guessing this is the fuel saver mode as some people say with these same cyl numbers. Where are these mds solenoids? Few people reported connection issues.

Yep, this can be the problem, but you need to start a new question for this problem.

Please post your new question here, you must be logged in:

https://www.2carpros.com/questions/new

Cheers, Ken