Gen 2 (2008) Prius keeps showing red car with exclamation mark, no codes showing up.

I had my break pads changed and they are working fine.

However now the multi media display keeps showing a red car with an exclamation mark on it.


The hybrid battery was just replaced a few months agao and charges without issue.


And the 12v is also testing as good.


The car is turning on and driving fine without issue and not making any weird noises or struggling to drive.


2 seperate mechanics have tried reading the codes but nothing shows up (yes, they have the right tool and have read codes for me before)


I also just replaced the air filter.


So any ideas on what the issue might be?

 

Also...yes, i have tried restarting it by disconnecting the 12v but the light goes away for a day or two but then returns.

 

I am not sure the make and model of the tool they have but in the past they have read codes and fixed issues including scanning hybrid battery to see if all the cells were good when i purchaced it