2005 Prius died on interstate today.

Went to run errands this morning with my wife. The car started feeling sluggish when we got on the interstate. After about a quarter mile the red triangle came on and it felt like the gas engine shut off. Drove about another quarter mile, under I'm assuming battery power, until we slowed to a stop. Shut the car off and restarted it to ready mode. Gas engine turned on in park but sputtered when put in drive. It automatically shut off gas engine and put itself back in park. I shut it off again an tried to restart it. This time went into ready and was able to drive a few feet before it shut itself off again. We got a ride home and grabbed a wrench to disconnect the 12v battery to see if it would reset and run. After the reset it will not go into ready mode. Had it towed home, checked the codes using obd2 wifi adapter and torque app. No codes showed up. I am going to check 12v voltage and plug for moisture.

Some recent history on condition.
Mil was for the coolant storage valve.
Ran low on oil last week. And switched to 10w40 thinking it would slow down the loss that is now around 2 qt every 3000 miles. Cluster and touchscreen shutdown intermittently, sometimes wont shutdown without holding pwr button for a few seconds. Buttons on right side of steering wheel not working.

 

275,000 hard mail route miles.
Yes oil light came on.

 

Yeah clockspring was on the list with removing fixing cluster/ touchscreen and replacing noisy blower motor.

 

Oil was overfilled a bit drained some off and unplugged the 12v
When I reconnected the 12v I noticed the gas light blinking. Started up and running now.

 

With the main cluster working intermittently it must have reverted to last gas reading before it died. If it dies a little bit each day it may not have been reading gas level correctly. When the car shut off yesterday the reading was over half.
I actually put gas in it before it got towed. Either not enough or I didn't leave the 12v unplugged long enough to reset.