2008 Prius will NOT move + Code P0A90 Drive Motor “A” Performance

The blue adapter will not show the subcode of this error, so it is difficult to choose the exact correct path. There are several options that need to be worked on.

https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8CPDF%E6%A0%BC%E5%BC%8F/Prius%20Service%20Manuals%202004/%E4%BF%AE%E7%90%86%E6%89%8B%E5%86%8C/04pruisr/05/21bpm/0a90242.pdf

 

The error code is an indication of the problem.
This error code has many subcodes.
The error subcode is an indication of the exact direction.

It is like the number of a multi-story building, and the number of the office in this building.

The transmission can be inexpensive, it rarely fails. But it is quite difficult to disassemble. You need work skills, lifts for large-sized heavy installations.

 

The eCVT is a planetary gear split in two and joined by a chain, so plenty of opportunity for grinding noises. Although it is more likely that the clutch plate has failed, and/or the drive axle at the clutch plate has sheared.

I'm not saying this is your problem. You will be best served by obtaining the subcode to guide your diagnosis and ultimately the repair.

 

It's difficult to judge the grinding noise from a short video taken from the driver's seat.


The Techstream program determines error codes and subcodes, records a freeze frame when an error occurs. This is a program from the manufacturer of Toyota, Lexus and Scion cars.

Special scanners for different manufacturers, "Multi-brand scanners" can also show this data, but here there may be both no information and incorrect information.
There is a topic on the forum where the Autel AP200 scanner is discussed, which shows data on various Gen2 ECUs well.

It is necessary to find out the error code and subcode, otherwise all actions will bring little benefit, but a lot of expenses from your wallet. I would not change parts thoughtlessly. Moreover, a number of subcodes can indicate problems in the wiring.

 

The ap200 will show your sub code for this code right in the list I don't know how to explain it but it doesn't no problem and you'll be changing your transmission it's not that bad of a job I don't know if I'd part a nice car out for that you can get them for near free if you were closer here you can just pick one up there's like three they rarely do this this is an outlier problem I've read about five maybe never done one personally but it's an easy transmission to change for the most part other than the inverter coming out and if you sets of wires but easy access nice clean bolts stuff just pulls out I can get people to come do it in the driveway a lot of guys now have a lift goes into their receiver on the back of their vehicle and can swing 180°, so they lift the transmission out swing it around set it down pick up the other one swing the boom around set it in the car it's literally that quick then that hoist on hitches from the hitch and goes right in the back of the truck station wagon van or whatever