The problem is electomechanical. They need new electronics, software, and a non binding pedal to fix the issue.
Hell, Apple called them out on the software issues when Steve Wozniac pulled the code off the Prius ECU and had a heart attack at how crappy the code was wrote and compiled.
All they did was deny that the code was that bad. This is the software engineer for Apple, the second largest software vendor on the planet next to Microsoft. You mean to tell me that this guy doesn't know what he's talking about?!?!?!?!
Project: 89 RS => AX/RR