I'm driving to work this morning and a bunch of warning lights came on. I was going uphill and the car wouldnt accelerate, the engine was revving up and my presses on the gas pedal didnt seem to be doing anything. I had to pull over a couple of times after shutting the car off and letting it cool down. Each time the car would eventually display the loss of power (would not accelerate, and engine seemed to be revving high with no input felt from gas pedal). Shutting off car and turning back on would cause this to go away. Over the last couple days the car seems sluggish and my gas mileage is showing ~36mpg instead of my normal ~43mpg. The warning lights come on, PROBLEM, comes up on the mfd, and the mfd had a funky little broken car symbol light in the top left corner. I also can hear what is like an exhaust fan coming from the back seats which I believe is the HV battery exhaust fan. I have never heard it this loud before. I check the inverter pump and will need to do it again but I believe I saw and felt turbulence (I will confirm again later when I get home). I hooked up the mini VCI and here are the codes I got. Hybrid Control - DTC P3000 HV Battery - DTC P0A80, P3015 ABS/VSC/TRAC - C1259, C1310 Air Conditioner - B1432, B1442 Immobiliser - B2795, B2796 Transmission Control - C2318 PDF VCI Health check results file attached as well as pic of warning lights. Any help would be greatly appreciated, I miss my baby already. My problems seems similar to these 2 threads. prius died on Highway. All warning lights came on. Hv battery discharges fast | PriusChat Help needed with warning lights for '05 Prius | PriusChat
It sounds like a failed traction battery is at the root of your car's problems based upon the DTC (P0A80, P3015), your observation that the battery fan is running fast and the driveability symptoms.
Update. I end up call out a repair guy and he ran me through the repair process. End up being 1 bad battery module, and he changed out the computer though im not sure why. Its a shame that a 40-50$ module brings up a 700$+ repair bill. Anywho all the lights went away but my gas mileage hasnt quite returned. Im getting around 39-40mpg. Either way if another one goes bad Im definitely changing it out myself. I wouldve done this one myself but my spare car was being used so I didnt have the luxury of time.