Red Triangle and Codes P0A0F, P0121 (Still Operational)

Hey There,
I have a 2009 Prius with 246k and the original hybrid battery.
I got a the Red Triangle of Death on a drive home earlier this month. The car made it home but there was a loss of power. Scanned it and got
P0A0F [0x0A0F]
Hybrid drive system - engine failed to start
P0121 [0x0121]
Throttle position (TP) switch A/accelerator pedal position (APP) switch A - range/performance problem
Accelerator Pedal Position Sensor / Throttle Position Sensor A Range / Performance
I cleared the codes and drove around the neighborhood. And it was operating normally. Eventually did reproduce the issue, same codes.
In both cases it was a hot day and I had started the AC some time beforehand.
Cleaned the MAF sensor but really didn't see any debris or dirt. The inverter pump is running too (I can see turbulence in the fluid container.)
Since cleaning the MAF sensor, the car is running normally. I've put mileage on it driving around town. But I'm hesitant to do a longer trip especially in the heat.
Any suggestions to get my confidence back in my ride?
Thanks,
Bill
P.S. There is also a code P0420 related to my catalytic converter:
Catalytic Converter System Bank 1 Efficiency Below Threshold
But I've been told the cat needs to be replaced. It's intermittent.

 

Thanks Brian! I found some videos on cleaning/replacing the throttle body. And seemed like I could find a used one on car-part. But I'll check the wiring for anything loose that might be affected by the heat. Seems like good easy first step. I originally thought the P0A0F was causing the P0121 but sounds the other way around. Thanks also ChapmanF!