While I was driving my prius 2009 2nd accelerator stopped working and I stopped it in side of the road ( the dash bord displays all warning lights including red death exclamation mark and hybrid failure mark on the display. So I towed it and they told it was the inverter pump I replaced it. But when I was drving my car later that day that problem came again. When it happend I was near my home so when I call to a technician he told me left it for a hour and drive the car to house. But when I start my car my car after hour car starts but engine won't start I can drive only with hybrid battery and motor .What could be the problem ?