I had a strange experience today, and signed up just so I could share in the hopes that it will help -someone-. 2015 Prius V Five, and all doors would refuse to lock. Using the fob to lock would do nothing as if the fob battery was dead, even though it isn't. Pressing the lock button on the driver's or passenger side would lock then immediately unlock all doors. When manually pushing the door lock, all doors would immediately unlock. Additionally, the car would beep when turned off, and beeped outside when I walked away. The car has no issues up to this point, all service is up to date and done by dealer, etc. In my case, the problem turned out to be this: a usb adapter plugged into the 12v port (cigarette lighter) at the console with a cell phone battery bank plugged into that (I was charging it while driving, and left it in the car when I got out). When it was finally unplugged, the car made a happy "yup, that was it, thanks" beep.
Thank you for this post. I had the same issue under the same conditions, power bank plugged into a charger in the 12v plug. Removed, now all good. Never would have thought...
My 2010 Prius is very much as you describe when I fail to properly shut the engine off. It has been very dependable that way. It can also do that if you leave a working fob in the car. That avoids calling AAA for being locked out. My Sister on the other hand has managed to lock her fob in her 2010 Prius after properly shutting off the engine.
I was going crazy trying to figure this out, looking at the door sensors. I finally found your post and had the same issue. This has happened once before and I never narrowed it down.
This is the post that I somewhat refer to when I tell people on here to never leave a usb charger battery pack plugged in at all times in the cig light plug. “Why not, what can go wrong?” is their reaction. I chuckle and move along hehe.
YES!!! My 2018 Camry Hybrid XLE was doing the same thing today, and I was wading through chat rooms looking for answers when I came across this post. The problem was indeed a small battery charging pack that I had plugged into my cigarette lighter port. I signed up just to confirm this, and THANK YOU to the one who posted it. You saved me a lot of time diagnosing the problem. I have been an auto mechanic for 25 years, but this is my first hybrid, and I am still learning about what makes that side of the car tick.
