Hi
Today the oil light start to blinking with chime sound .
I checked the Gauge info in the oil pressure and I saw 3 lines , sometimes it go to "low" and jump to normal range .

Any help ... please see the attached photo .

Assuming you checked & the oil level is OK, then you need to get a oil pressure tester. You can get a cheap one from Harbor Freight.

Pat

It could be the sensor went bad but you have to know first if the oil pressure is OK or not.

Pat

Loud noises from the engine?

If not, then you probably have oil pressure. 3800 Series 2'* aren't known for losing oil pressure without being out of oil, heavily abused, extremely high mileage, and/or a combination of the three.

My $0.02:

It'* an 18 year old 3800 series 2. If the oil pressure sensor hasn't been replaced in a while or you don't know how old it is then you should replace it.

Then if it still has an issue then troubleshoot further.

I'll bet that the connector is full of oil right now.

Thank you !
I'll check the connector and update .
I don't know when the sensor replaced but when I check the oil level i see the level is a little bit more high from the maximum level . It'* could be the reason ?

Throw another oil pressure in it and see if it works. They have been known to leak and cause fluctuations in OP. This is a lot easier to do then plumbing in a manual OP gauge.

What Mike said ^^^^^^^

. . . and:

No, that'* not the reason. You can run it a quart over full without any issue. Don't do it. Just trust me on that one.

Just curious what you found out? Did you resolve your problem?

Tomorrow I'm gonna to replace the sensor . I allready bought it .
I hope it will solve the problem .

Did you check to see if it was leaking at all?