After working with multiples dealerships and a specialist sent out by Toyota Corporate, I'm hoping you all have more answers than they do! Car: 2015 Prius 4, purchased at a Lexus dealership (my first mistake) Sept 2020, 69k. Had it inspected before purchase and it checked out. No extended warranty. Problem: Oct 2020: 6 days after purchase, Check hybrid system + check engine + red triangle on, took to local Toyota dealership 1, was told there was water in the engine from when the selling dealership detailed it. They cleaned out whatever was affected, gave it back. Nov 2020: Check hybrid system + check engine + red triangle on again, drove to a different toyota dealership #2 (was traveling), and it all shut off just before I got there. They found code P0A4B, couldn't replicate the problem, and gave it back. Dec 2020: Check hybrid system + check engine + red triangle on, car shut down while driving, had it towed to local Toyota dealership 1, they found code P0A4B and told me invertor needed replacing. Replaced under warranty. Dec 2020: Car wouldn't power on, jumped it, and replaced the 12V battery, which had been replaced in 4/2020 by previous owner (only noticed this in maintenance log after paying for it....), at recommendation of Toyota Dealership 1. March 2021: Check hybrid system + check engine + red triangle on, drove straight to local Toyota dealership 1 (made it before car shut down!). They found code P0A4B again, said it was a fluke, looked me in the eye and said nothing was wrong, it was safe to drive. April 2021: Check hybrid system + check engine + red triangle on, car shut down while driving. Was in another state and had towed to a nearby dealership, Toyota dealership #3. The next day the car ran fine for them, but they found code P0A4B. They were shocked it hadn't been escalated to corporate by dealership #1 after happening repeatedly and fixes not resolving it. Told me to trade it in ASAP. They clear the code, I drive off towards home. April 2021 (last weekend): Check hybrid system + check engine + red triangle on, car shut down while driving back (~4 hours of driving since last occurrence). Had it towed to my local dealership #1. Same code, P0A4B, and now they want me to replace the transaxle. I opened a tech case with corporate, and am waiting to hear back, but the dealership says the specialist corporate sent has only ever seen this happen in one other Prius ever. Waiting to talk to the case managers again tomorrow. At this point I'm hoping to trade it in (no chance I'm trusting them to "fix" the problem after 4 rather traumatizing shutdowns while driving and many "fixes"), and they will, but I'm losing a lottttt of money. I'll be sad to leave the Prius family, but they don't have any CPOs on the lot and I can't spring for new at this point. It seems I am down the creek without a paddle on this one, and would appreciate any advice. Am I missing some other possible diagnosis? Other solutions? Do dealerships trade cars (e.g. if I find a CPO Prius elsewhere)? Thanks in advance!