Loss of Forward Power on Freeway (Red Exclamtion and other lights illuminate)

You learn the most by putting a pressure gauge on the fuel line and checking that the pressure in operation is within spec. It's a bit involved because there's no supplied place to attach a gauge. Even at a dealership they'll just unhook the hose at the firewall and MacGyver something up with a tee and fittings. They have part numbers if you want to do the same 'official' MacGyverage that they would.

 

The car isn't actually 'starting', it is only turning over the engine in an attempt to 'start', then gives up in 8-10 seconds after not starting.

The quickest way might be to grab a can of starting fluid and see if that gets the engine to actually 'start', and in turn keeps the engine running longer than 10 seconds. This will only tell you if the problem is related to the fuel system; fuel pump, relays, injectors, fuses, wiring, filter, etc.

When was the last time the MAF sensor and throttle body were cleaned?

 

The HV battery problem is most likely a casualty of your actual problem, not the cause of your problem. The HV battery is what spins the engine to start it. All those times you've tried to start he car (unsuccessfully) was actually the HV battery spinning the engine for several seconds. It can only do that so many times before the battey is depleted. That's where you are now. A new battery isn't going to solve JACK, unless you solve the original problem of why the engine will not actually run. Your battery needs to be charged, not replaced. Unfortunately a Pep Boys 'tech' is about as likely to be able to do that as go to the moon.

 

Good deal for the buyer

 

So I've figured out the problem with the car in this thread. There were multiple errors to get where we are at. THE CAR RAN OUT OF GAS

Combination meter does not work in car, can't read the fuel level. The car ran out of gas. AAA instead of putting gas in the car and calling it a day, towed to Pepboys. Pepboys tried to start the car without the combination meter working couldn't start it (or not knowing if it started without a working combination meter). Tried multiple times and eventually drained the 12v battery and the already depleted HV Battery from running out of fuel, to throw P0A80. Pepboys put in $10 of gas but at that point, the batteries were dead and couldn't start the car even with fuel in the car.

This car needs a few things starting with a working combination meter, 12v battery, HV battery, a set of 4 vents (completed crumbled when removed due to sun damage), and some body work. After those repairs are made, the car should be good reliable transportation.

I guess this all could have been prevented with a working combination meter

 

My Sap on gauge comes with these fittings to cobble this setup. So tech doesn't output fuel pressure maybe it just knows if the pump is supposed to be on or not. Which is typical in my power sports equipment My EFI bike will start but as soon as I try to give it a little bit of gas when the fuel pump is acting up it will fall on its face because it doesn't have enough pressure to get into the progression phase or whatever is going on I changed the pump all is finished working perfectly this has happened in a couple of my Corollas over the years very similar. These pumps that I'm pulling out of these vehicles are well over 100,000 miles except for the power sports equipment which are at about 50 or 60 which is a lot for power sports equipment like motorcycles and snowmobiles etc