Hello im writing on here to try and get help for a old friend of mine, hes about 80 and is very frustrated with his 2001 prius and i would like to help him fix it. Here is what is happening, after driving the car for anywheres between 30min to an hour the car will suddenly lose power, you can mash the accelerator to the floor and there is no response. Then the vehicle will shut down forcing you to get off the road. All three warning lights on the mfd come on and the vehicle is essential dead. Although you can turn the ignition on and off three times then the warning lights go off and vehicle will start up and run fine. It shows no signs of any problems until it happens another hour or whatever later. There are no noises or any obvious warning signs that accompany the problem and besides the vehicle shutting down, it seems to run and drive great. Any assistance troubleshooting this issue will be sincerely appreciated by me and my old buddy frank, Thanks.