2008 runs rough codes P0A92 C1310 B1421

2008 Prius scanned with BlueDriver
P0A92, C1310, B1421
Runs rough, especially at warm up. I cleared all the codes and these are the ones that came back.
BlueDriver says
P0A92 - hybrid generator performance, transaxle failure
C1310 - no code definition, fix range from new fuse to new HV battery
B1421 - Solar Sensor Circuit passenger side

It looks like I need a new transmission. I'd like to be able to verify it before I tear the car apart to replace it.
Any test suggestions would be great.

 

I cleared the codes again and the C1310 disappeared.
P0A92, B1421 are still present.
In park I can press on the throttle pedal and get acceleration up to mid RPMs and then the Triangle, (!), VSC, CEL turn on and the RPMs drop to flat level and the throttle no longer has any effect in park. I can still get the car to move forward and reverse.

 

I have a parts car. I found the location of the Solar Sensor, in the front left corner of the dash, under the State inspection stickers.
The sensor is easy to get to, if the car is in pieces. It is installed from the top, but needs to be removed from the bottom. If you push the driver's seat all the way back, lie on your back and reach up, you may be able to get to it, squeeze the two clips and push it up out of the dash.
After swapping the Solar Sensor between the two cars, I cleared the codes again and restarted the car, ran it until the Triangle appeared. All the codes came back. Swapping the sensor had positive result.

 

Thanks for the feedback.
I am working on following the directions for swapping a transmission.