Luckily I was close to home and had a low oil pressure warning light come on.
First thing I did was check the oil level and it was normal, but the oil needed a change so I changed the filter and oil. The light was still illuminated so I ordered a new oil pressure sensor unit and changed that out. Still got a light.
Looking at the forums and YouTube videos, I'm cringing over a possible oil pump change, or even bad crankshaft bearings.
I decided to test the electrical side and unplugged the sensor. From what I have read, the sensor is grounded in it's normal state, creating the circuit for the light, and with pressure the circuit is broken, turning the light off. Thinking that by unplugging the sensor, the light should theoretically go out, I unplugged it but the light remained on.
Question: Am I thinking about the oil pressure sensor correctly? Should the light go out when unplugged, or is it opposite and the light should go out when the circuit is grounded?
On one hand I'm potentially relieved it could be simply electrical, but then again I'm worried it is electrical (haha).
I've got an oil pressure testing unit coming tomorrow to make sure everything is good on the mechanical side. Any tips/tricks for a potential electrical issue would be greatly appreciated.

 

Okay, so just an update, I replaced the oil pressure sensor but the light still illuminated. I purchased an inexpensive oil pressure gauge and measured the pressure. The pressure was very good, cold it was about 4.5 bars (65 PSI), and warmed up it was 2 bars (30 PSI).

Needless to say, the engine has great pressure.

Next I reinstalled the pressure sensor and measured it running and not running. Running the single pin and ground had no continuity. Engine off, there was continuity, telling me the sensor was working properly.

Next I checked the wire itself, disconnected, and there is continuity between the wire and ground, telling me there is a short somewhere.

I plan on disconnecting the cluster connector and measuring the continuity of pin 3; if there is continuity then the wire itself is shorted somewhere. If there isn't, the issue is most likely in the cluster itself.

I'll keep updating as the investigation continues!

As a side note, I noticed others on the forum stating that their low wiper, low coolant, hood open notifications were popping up randomly and that they had to send their cluster in for repair. I do have those that pop up occasionally even when the coolant, wiper fluid, and hood is closed.

 

 

Well, progress! The removal of the cluster is quite easy; just found a clip on YouTube to remove it, took less than 10 minutes. I disconnected the cluster, then went to the pressure sensor connector (disconnected) and measured continuity. No continuity, zip, zero, nada. This means the wire isn't shorted out somewhere between the pressure switch and the gauge cluster. I plugged the cluster back in and measured the continuity, and bingo...it was shorted out.

Using some of the advice on the forum, I'm finding a cluster repair shop on Ebay (here in the USA) and will ship it to them.

Other considerations, I would occasionally get a low coolant level notification, low windshield wiper fluid notification, and a hood open alert on occasion when none of those conditions existed. I'm hoping it is all related!

I'll update this thread with what cluster repair shop I use, and if the issue is resolved after the repair.