prius 2010 hazard light on by itself

The first step is to plug into the OBD2 port and run a scan.
You'd be surprised at how much data these things put out if you use the right scan tool. And, it's a lot cheaper than throwing parts at it.

 

One thing to check (and hopefully eliminate) is rodent damage.

 

H᠎i,

You have the well-known issue documented in this thread.

 

Hello. I’m new…and also not a mechanic. My hazard lights wouldn’t stop.A local mechanic franchise told me they don’t work on these cars, that I had to take it to a Toyota Dealership. I did. They said I needed all kinds of stuff (of course). I attached the estimate.
I also attached the codes that showed up when I took it to AutoZone.

So I’ve read some of these stories and fixes.
It looks like I might fix it by clipping a blue wire on something.
Or possibly replacing the skid ECU altogether.
I already work 2 jobs, but maybe on a down day I can do more research and try the first option. If that doesn’t work then replace the ECU. I can’t afford to pay thousands of dollars to get this fixed. I am hoping to have some of you mechanics that are familiar with this stuff to ask questions.
Please tell me if you think I’m being unreasonable.
Thank you so much.

-Tina