P0A0F and P3190

Hoping someone might be able to help me with this.

About a month ago my '06 felt like it lost all power... moments later the dashboard lit up and the car would not accelerate or start. I ended up replacing the 12V battery and the car ran fine afterwards. Didn't have my actual code reader but all we could read was P3190 at the time.

After nearly a month of driving with no issues the same thing happened, this time I was able to get codes P0A0F and P3190. Took it to my mechanic who thought it was the fuel pump but when he tested it everything was fine (good pressure and volume). He says he added some ether to the car and it started up just fine, no issues since (he's had the car for 2 days now). Car has been driving fine and completely normal.

His next leading theory is the throttle body is on its way out, but even he said he wasn't 100% on that diagnosis. And replacing it will end up being a $750 job for something we're not certain about. Anyone else have any other idea what it could be? Planning on taking the car back and driving it around until it happens again, but it is scary feeling like I'm driving a ticking time bomb...

TIA!