Hello, I am newbie to this forum. I have been dealing with issues with 2006 prius with 145k miles. When I start my car ready mode flashing two times then car starts. Hybrid battery is in excellent condition no issues so far.
More details please? MPG ok? Any warning lights ever? Have you tried "rebooting your computer" aka: disconnect 12v for a few minutes?
12 volt is getting ready to pack its bags and hit the road. Replace the 12 volt battery in the trunk asap.