will not go when pressing the gas pedal at first

Is this from standstill? Are you sure the hill hold is not active (gets activated by depressing the brake pedal fully).
How long does it take to start moving? Is this a fraction of a second or more like a second?
The only times I experience hesitation is when I'm driving at slow to moderate speed (behind a slow vehicle) and press the accelerator to overtake. Then there is a slight hesitation before the Prius makes up its mind what to do, like what your dealer said.
But never from standstill.

 

I would say your battery is warm along with being at a low state of charge it will act like this. If you pay attention as you smoothly press the accelerator pedal the car will accelerate in stages as if you were pressing the pedal down then holding then pressing more then holding. I believe it is the computers trying not to use anymore energy from the battery then it has to so it can bring the state of charge up and the temperature down. I have a scangauge on my car and being from Florida sometimes the battery will be over 120 degrees just from sitting in the sun. Seeing how you're in Mississippi it could also be your issue.

 

does it creep when you take your foot off the brake? maybe your brakes are dragging.

 

i would think you'd have a code, if that were the case.

 

Could be in the pedal. What do you suppose they use down there, FSR, capacitive, precision potentiometer? Corrosion in the connector plug or socket? Car ever been flooded? Intermittents are always difficult to diagnose.

 

Guess what? I have exact same problem.
Went today to Toyota dealership and they want $3500 for a brake actuator. He thinks it not covered in powertrain warranty that I was given by dealer. The salesman told me that about everything but battery was covered!
My problem started a few weeks ago. It is always from when I am still like at stop signs or stop lights.
At stop lights, light turns green, I press accelerator and it won't move. I have to push it over and over usually 3-4 times. I have not counted how many seconds but I about miss the light. Probably at least 5 seconds or more. No code.
Also now it's doing it when I start my car, put it in reverse and it won't budge.
It feels as though my emergency brake is on and when I press the gas it just won't move.
He is checking with the warranty company Monday. I've read all about problems with 2010 Prius and 2012 Tacoma and Lexus but it appears they aren't admitting a problem with 2012 Prius, I only have 63k on my car and I'm very disappointed that Toyota would do like this at this mileage especially. I bet I'm not the only one with this problem on a 2012. If it's not covered I will be calling not only Toyota but the national safety people too! By the way my son in law has a 2010 Prius. I keyed in his vin number and no recall came up about the brake actuator but you can read all about it online.

 

bummer, how many miles on her?

 

63,500. So disappointing to me. Expected better than this from Toyota,

 

yes, that is frustrating. i would call toyota monday morning. hopefully, they will at least help with the cost. first i've heard of it on a 2012.

 

my feeling is if they are having battery actuator problems in multiple cars and years, obviously there is a problem with the battery actuators.
That is not my fault and I shouldn't have to pay for
their faulty equipment failure. I could have bought a cheaper car than a Toyota Prius but I thought I was investing in a quality car from a company that stands behind their cars. I am not wealthy and took 10k out of my retirement savings to help me afford it. Surely I am not the only 2012 Prius with this issue. I hope my husbands Tundra doesn't malfunction too. The service writer said it's not because it's a hybrid.

 

there is an extended warranty on older actuators, due to so many expensive failures. plug your vin into the toyota owners site, it will show any recalls. but as i said, i haven't heard of any problems with the 12. i'm sure there must be some though.

 

Nothing there , not even the air bag issue is there but toyota service advisor says it's going to be recalled. I even put in my son-in-laws Prius 2010 and the brake actuator didnt gone up yet 2010 model is documented and was on NBC news about recall. There were some 2010 model recalls on there.

 

Seems like every damn thing on the car costs $3500.

 

another route might be a local mech and a used part.

 

i already got the airbag notification by mail, did you?

 

no but the service advisor told me a recall is coming out on it

 

no but the service advisor told me a recall is coming out on the airbag issue