12v battery was disonnected, parking malfunction

Hi all

I had the 12v battery of my Prius 2010 disconnected to install a backup camera, but then had a change of plans, so after a couple of hours I reconnected it. But when I started the car I got a yellow triangle exclamation and this error message -"p lock malfunction when parking , park in a flat place and apply parking brake securely".

The car starts, shifts into reverse and drive, and does not roll on a flat surface when turned off.

How can I fix this?

Thanks.

 

Thanks @xliderider . I have taken the car for a drive, parked it on some pretty steep slopes, but the parking light on the center console does not work, and the park indicator does not get highlighted. But when I turn off the car, it does not roll.

I also installed a new head unit. There was a bolt that slipped and fell into the central console housing. I tried reaching it and gave up. I am unsure if I accidentally disconnected some wiring underneath it.

The error is persistent and comes on with each restart.

 

1. My battery outputs 10.6v when the car is on but no accessories are on.

2. Which wiring? I have a few wires that need to be tucked away from the head unit I installed. Would that be a problem?

Thanks.

 

I don't think it's been replaced, but I am not sure. In any case, I never had this problem today before I disconnected and then reconnected the battery negative terminal? I never had this problem before today. There was some sparking when I put the bolt back on the terminal post. Could that be the issue? If so I will take it to a mechanic to replace the battery.

 

@bisco

I haven't installed the camera yet. Will do so in a week. And yes, I can follow instructions pretty well when doing something. If I find some clear instructions on how to change out the battery I will try it out myself.

@JC91006

I will try the battery change and will let you know.