2012 Prius Intermittent Hybrid Battery Warning

Hello everyone,

I have a 2012 Prius that has had the hybrid battery warning light come across the dash many times in the last 2 years of ownership. I took it to Toyota and they said they couldn’t find ANYTHING wrong with the car. Causing me to unhook the battery EVERY time this light comes on to reset due to no known issue causing this.

I have had codes read and not noticed anything in particular related to the battery. When the engine turns off from being in hybrid mode it rattles pretty bad. Even after having them engine replaced over a year ago.

Any suggestions? I’m not sure if it’s the MAP sensor etc, but this car is my daily driver and I really want to fix this problem as it is not safe, when driving on the freeway and the light comes on randomly causing the gas to become slow to respond.