Red Triangle / "Problem" Text on Screen / Red Car with Triangle Appears on Screen / Check Engine

welcome!
i would try harder to read the oil level. keep cleaning it and looking at both sides in different light. try to ignore the streaking.
add a little at a time to see if you can note any change.
driving with it slightly low on back roads should be okay

 

Plus one on checking the oil. Low oil is a killer. Wipe clean and look for the level in the MIDDLE of the flat part of the dipstick. Bisco is correct ignore the higher levels on the sides where is drags on the dipstick tube. If it is REALLY LOw it will be harder to check. Add 1 cup....wait and recheck.....any change? add another cup....check again.. I recently did this on my wifes car and it was almost a quart low. Now I know she might be starting to burn oil...So I check it every week.
I'm in Leawood on the Kansas side. Reach out with any further questions. and welcome....

 

More than likely you're inverter coolant pump has failed if the car on the multifunction display in the center of the dash is turned from red to green. You need to look in the jug that's attached to the side of the inverter which is the silver covered box right in front of the driver standing in front of the car to the left of that box Is it container with pink fluid in it The pump for that pink fluid is under the forward right edge of that silver boxed inverter thing that we just talked about You can literally reach your hand in between the inverter corner and the headlight and see the pump it has two 3/4 size hoses going to it that are pre-bent. When the car is ready that pump should be making a little noise and should be vibrating when you touch it if you just been driving the car both of the two hoses the temperature should be similar unless you've been driving excessively hard in the high heat but anyway. If the pump is vibrating and all seems okay if you undo the top of the coolant reservoir for the inverter that we were just looking at you should see that coolant moving If you don't that's kind of a giveaway that you're having a problem moving that coolant through the loop and cooling it.

 

Did you change the oil yourself? Or take it somewhere? Sometimes if less experienced shops change the oil they add 4 quarts by default which is WAY too much for the Gen 2. I usually do my own and add 3 quarts then check it. then add oil a cup at a time and recheck until level is good.

 

The buzzing noise is normal for the brake pump

 

I wouldn't call 0.1 qt WAY too much. Gen 2 calls for 3.9 qts with a new filter. Maybe you were thinking of Alldata's incorrect entry for Gen2 Prius that has the fill quantity as 5 qts?

 

Hmm. That could very well have been it. I have just read about bad things happening with overfilling. I like to do all my own oil changes so I can pay close attention to when I start burning more oil.

 

I just put in 3.5 quarts and called it good.

My first oil changed I fussed with 3.9 quarts, but Patrick Wong recommended to me to just do 3.5 and call it good. Of course, I checked level every couple of weeks. Never really burned oil though.

Just an aside, the Prius dipstick can be a pain to read. I always checked oil after car had sat all night. Usually, as mentioned above, one side showed different than the other side of the stick. Again, Patrick said to believe the lower reading.
kris

 

It gets easier and easier to read as oil change time approaches. Then you change the oil and it's hard to read again.

Wait, this isn't the venting thread?