My Prius had been parked for 2 nights & a full day when I backed it out of my carport this morning. As soon as I shifted to â€œDâ€, the Master Warning Light (bright triangle with !) came on and â€œPlease press â€œPâ€ to engage Parkâ€ â€œThe batteries will not be charged if the transaxle is in Neutral Nâ€ appeared in the MFD. The warning buzzer sounded continuously. I tried everything I could think of, including turning the power off & restarting, but it wouldnâ€™t go away. Then it went away as quickly as it had appeared. I donâ€™t know if the â€œsituationâ€ had corrected itself, if I unknowingly shut it off or if it was a â€œtimedâ€ warning. The battery was â€œalmostâ€ fully charged. Nothing appeared wrong so I took my planned 120 mile RT w/o any problems whatsoever. Later, after considerable searching thru the manual, I finally found a reference to the message that I had seen, but the explanation only told how to check for proper functioning dash indicators. Nothing was said about what caused the warning or how to turn it off; nothing about gears or charging the battery. Based on the message in the MFD, logically the warning should have occurred when I last parked the car. When I bought the car my salesman made a point of telling me that the car would automatically shift into Park when the power was turned off. This is what Iâ€™ve been doing. The Park button always lights up. I never shift to Neutral. 1. Is â€œParkâ€ automatic after the power is turned off? 2. What could have caused the warning? Could I have accidentally moved the shift to Neutral after switching off, causing the battery to â€œdrainâ€? 3. Does the warning turn off automatically?