don't know whether someone has been posted this before, to me I havenot seen such post. feel a necessary to write it down. the day found the battery out of order when I sat in my 2006 rx400h listened radio for half hour, I decided to move chair back to make a little comfort, during the chair movement, suddenly the power went out, radio stopped, then I couldn't start the engineer, got err: "shift to P when starting", so jumped start with help. second day morning, would not start engine, jumped, afternoon it was good to start. third day, same story, so I followed some friend's advice to start the engine, disconnect the 12V battery positive pole connection to see what happen, everything sounded normal without that battery, so I thought the alternator was good to support the engine and car's electricity requirement, after I reconnected the battery, I had three warnings, scary,
1: shift to P when starting
2, check VTC system
3. check hybrid system
all of them disappear after I replaced the 12 V battery.

 

Yup, common issue with an old 12v battery that is so small. Remember it only turns on the computers and system, it does not actually start the Gas engine, that is done thru the hybrid batteries...Thanks for your input and welcome aboard.

 

Yep, needs a 12 volt battery replaced. When you pull it out you will be surprised at the small size. It doesn't do much other than power the computers, as Thomas1 stated.

 

On tip, I changed a lot of my interior lamps to LED so as to use less currant incase my wife leaves one on.....