My car is Prius 3rd 2013. The problem is that sometimes a photo error is displayed on the instrument panel. And the small triangle yellow warning lamp illuminates on the right side. It is irregular, not periodic or repetitive. If I translate Japanese, I think it means that can not find key. The strange thing is that there is no problem when driving alone. It usually occurs when other passengers get on or off the back seat. I don't think it's a problem because there's no battery. What's the problem?