My Gas Motor turns on as soon as touch the accelerator

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How many miles on this vehicle?

How did you read the thrown codes previously?

 

What voltage does your 12V battery charge at? Should be about 14.0 to 14.5V.
11.6V is basically flat, and will likely ruin it in a short time.

 

This.

Sounds like the HV side of the equation is not working properly or possibly at all. Usual suspects: inverter, inverter pump and/or HV battery weak/failed.

 

Your HV battery pack might be heading South already. No matter what you do, until the HV part of the equation is sorted out, before you'd get a relief.

 

i think torque pro is a decent prius scanner.

but i have concerns about the second 12v battery you installed. is it new? did you check the voltage before installation?

 

The Prius is typically pretty darn good at coding an HV battery when it's getting to be time to replace it. If there's no HV battery codes, I don't know that I would focus a lot of energy or money in that direction. If your brand new 12v battery is 11.6v, I think I'd rectify that situation first. Put a low amp charger on it and top it off. My manual says it should be limited to 3.5 amps.

Start with the obvious things first. Tearing into the HV battery with no codes seems like unwarranted business to me.
Get a good 12v charge, re-install the battery, and test it out. Just keep in mind you've put new O2 sensors in, and cleared all the ecu maps when the 12 v was off. And I'm sure the weather is cold as a witches t*t where you are. None of those things are immediate positive things in your corner. What injectors/plugs and oil did you install? Is Techstream available to you?

 

The main things I've noticed that can cause the engine to be a bit "hair triggered" in wanting to start like that are:

1. A weak HV battery.
2. Low state of charge (4 or less bars on the energy monitor screen).
3. Very high temperatures (including blocked rear cooling fan).
4. Very low temperatures.

Before worrying too much about number 1 on the list, check if any of the others are applicable. Have you checked the rear cooling fan for blockages (dust,fur,lint etc).

 

This may sound rudimentary, but do you have the heat on, and is it cold outside? I am in Colorado and when it is cold out, both of my Gen2s act that way.

 

It' an 06, the traction battery is 12 years old, just buy a new from Toyota traction battery and get five years of 50+ mpg, and make sure that the plugs you put in are good, your mileage is really low, missing cylinder low.
Last word was Toyota is selling the traction for 2000$, not a bad deal, did you buy a new 12v or swap a used one?
Is your air pressure 40, is your emergency brake cable binding?

 

That scanner looks pretty advanced, like to the point of being able to scan/log/play back live data.

Can you scan while putting a load on the HV battery?

 

How are you guy's MPG when its super cold? Should we see low 30s when the car typically gets 40s mpg in regular weather?

 

Trickle charger the 12volt couple times a week. Car charger sucks.


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Did you notice improvements in power after the injectors where replaced?

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