Red triangle not even one year after replacing the Hybrid battery, whats going on?

I was on my way to work this morning when i was at a red light and noticed my Prius suddenly sound like it was running on high rpm's. I switched it off and turned it back on after the light was green and took off. As soon as i hit the interstate, my red triangle (not flashing), orange exclamation point, and vsc light, and check engine light was on.

I immediately pulled over and after a few phone calls drove to the dealership. Bad news was 80 people in front of me and basically told to go make an appointment. He said since its not flashing, im safe to drive it though. So i drove home.

After i left the dealership the only light that was on was the Red Triangle and check engine.

Less than a year ago i replaced the hybrid battery with a new one. So, I dont think its my battery, at least it better not be at least or im going to freak out lol. I am 90 miles overdue for an oil change. And the most current work i have had done on my car was removing a rusted break shield and getting my front end realigned.

2007 Prius 120k miles. Prius feels like its driving normally otherwise.

 

I ended up driving to AutoZone where they said it was my catalytic converter, so i took it to my muffler shop. She looked it over and told me my cat is fine, but something with the "hanger bar" was broke and causing a leak in the resonator. She welded it up for $35 and now all my lights are off and im good. Ended up being the easiest fix, thankfully.

 

Dons Muffler Clinic. Its a woman owned shop off of Cherokee Street. She got me in and out in 10 minutes. She also was very generous and helpful last year when my catalytic was sawed off my Prius.

 

i didnt have to delete the codes myself, but they were all off as soon as i was handed my vehicle back.
And yes she! Woman owned muffler shop here in St Louis. Shes very affordable, helpful with options, and always gets me in fast.

 

I wonder how much of the catalytic converter code that Auto Zone gave me has to do with me not having a "real" cat on my Prius. I have a cheap one from amazon, because Catalytic convertor thefts in my neighborhood happen very frequently every night. At the time i couldnt afford the full repair. It works and everything, but technically it would fail me when it comes to getting an inspection.

 

the catalytic convertor i bought off of amazon cost about $100 even. I dont know much about all that realistically, but my mechanic told me in our state that it would most likely not pass a safety and emissions test. But she said it would get me by up until my tags need to be changed.