So i unlocked my car the other night, got in and the car would not start. the check engine sign appeared while everything was dimming and flickering, going on and off, and the power button was lit up orange..kind of strange. is this a 12 volt battery issue? the car eventually started up and worked fine for a few days but now its back to not giving me any response again. no one seems to carry the battery but toyota either. so my question is should I go ahead and have a new battery put in? or is this another issue? thanks!