Driving sudden steady warning sound, CEL, and Red Exclamation marker car stops after awhile

I was driving with the AC running this morning and upon exiting a highway ramp going downhill I got this warning sound. Then CEL too with a Red Exclamation mark sign and the sound won't go away. After 7-8mins of driving the engine or throttle completely shuts down. The car has power, it was running the AC and radio, I turned them off.

I remember getting this if I park the car on an incline or hill but this time it had a CEL with it.

Then parked the car and took awhile holding Power to get it to power off. Start it after 5 mins, it drives for about 7-8mins it came back on. No CEL but only the sound and the red exclamation sign. I was able to slowly drive it in EV only and was able to get it going for about 5-10mins then it did it again and then same thing occur. Finally at the 3rd restart I was able to slowly drive to my work place parking lot and parked it with the red exclamation mark and no beeps and no CEL.

I'll wait til after work to start it up. Hope it's nothing major, perhaps the 12v battery? Had new one changed about 4 years ago.

 

I was think of having the car towed but I was about less than 10mins away from work parking lot.

Anyways, it was driving in EV mode since I was driving slowly on the side but the motor did start up a few times when it gets above 20mph.

The CEL did go away and had the Red Exclamation sign which I thought maybe the tranny overheated since it is 95F today.

I did recently changed the oil and filter less than 300mi ago.

Here's hoping nothing else come up when I go home, I need to cover about 25mins of driving to get home. I do have a code reader at home I can use to see what the CELs are.

 

It's not free parking, was amazed I got there. Now, I have gotten this before a few years ago while parking and it went away the next day. The CEL went away, I probably just need to restart it or wait til it cools down today. I plan on driving on the right side and anything happens I'll pull over the side of the road like I have been if it really can't give me 13 mi I'll call to get roadside assist. This car has stalled on me 3-4 times in the past but have not done this repeatedly like 3 times in one trip. Will find out later. It's Residential driving.

 

About 170k, no issue with the hybrid battery. Shows full most of the times and able to drive in EV. The only problem I've had was last year in December the 12v battery mysteriously emptied and needed a jump and been fine since.

 

If it occurs later or again I will shoot a video and post it on Youtube. It's basically an the same beep you here when driving with the door not fully closed. Which is what I thought maybe the computer today needs to cool down and reset and was able to drive it once the CEL goes away but the Triangle still remained.

 

Good news, I arrived back home safely. Drove home, I waited til the traffic lightened up to go home. I kept the max speed under 45mph. The CEL stayed on including the red triangle. Couldn't get it to turn off.
I got home and hooked up the Scanner and found one active code. P0A93 Inverter Water Pump Failure. That probably explains why I hear a pumping sound sporadically during turns.

 

Good news, I arrived back home safely. Drove home, I waited til the traffic lightened up to go home. I kept the max speed under 45mph. The CEL stayed on including the red triangle. Couldn't get it to turn off.
I got home and hooked up the Scanner and found one active code. P0A93 Inverter Water Pump Failure. That probably explains why I hear a pumping sound sporadically during turns.

 

Good idea, it's so hot today, no wonder it overheated so quickly. I have to take a look at it soon and see if it's just air bubbled clogged or the actual part. Because I just remember the water pump was changed 2 years ago per the recall and now it went bad again?