Help (16C1)Throwing code P0AC2

2016 priusC 1. check hybrid battery alert and check engine light are on. Code p0ac2.

Looked up the code and wondering how exactly I could check to see if the sensor module on the side of the hybrid battery is bad. We took all the covers off and checked all wires and connectors and nothing is corroded. Is there something else I should be looking for ? Idk anything about hybrids unfortunately and can't afford a mechanic right now.