2008 Prius with red triangle will not go into drive or reverse

Last week when driving my 08 Prius the check engine and red triangle of death came on. Drove the car home but as I got to my street it starting driving strangely like the transmission was slipping. On my Dr Prius app I saw one of the banks in the hybrid battery had failed. I had this same issue back in Jun 2019 and replaced 2 cells myself and reconditioned all 28 cells. This time I bought 10 used cells off eBay, reconditioned all 38 cells and used the best 28 cells with the highest mAh capacity, all over 5000 mAh.

Today I put the hybrid battery pack back in the car and upon starting it up the check engine and death triangle lights were still on. I checked the Dr Prius app and the hybrid pack now appears to be fine, but the car will not go into drive or reverse, only neutral or park. The engine never comes on. I tried hooking on my generic code reader and it says no codes found. I also have a wifi ELM 327 and Toad Scan pc software and again found no codes on any of the three computers that I can connect to. The starting battery is relatively new and is showing 12.3 volts. I tried disconnecting and reconnecting the battery to see if the codes will clear but no help.
Does anyone have any idea what I can do besides having it towed to a dealer? I'm wondering if maybe the transmission is throwing a code, is there anyway to check that?

 

Here's a photo of the dash, all the lights remain on including traction control, (!), ABS, VSC, check engine and red triangle.

 

Yes I have the orange safety clip and all 3 white plugs back in correctly. I never disconnected that small black one by the orange clip. When I use my generic scanner it finds no fault codes. When I use my Toad Scan software it brings up three computers it can connect to, ECU$E8, EA, and EB. None show any active, stored or pending DCT’s. I ordered a VXDIAG VCX Nano scanner that should arrive today from Amazon. Hoping that will show me some Toyota specific fault codes.

 

Ok, very embarrassing. After posting here, then buying the VCX Nano scanner for $89, then paying $5 to text with a mechanic from Just Answer found I had forgotten the last step of sliding the orange safety clip down! Car was showing code P0A0D with the VCX Nano scanner, but showed no codes with my other scanning tools. Pushed down the safety clip and the vehicle is now running perfectly! The transmission did stumble once when backing out of the drive, but I think that was because I had driven it so long with the bad cells & lower voltage that it was impacting how the transmission worked. Apologize to all who posted on this tread for the false alarm.

I did learn something though that I’ll share for anyone interested. The VCX Nano is great but was extremely difficult to get set up. It comes with no instructions, just a mini disk with a file that has a .rar extension. I learned that is a type of zipped file. Once I got the files unzipped there were 3 executable programs. The first is the Techstream scanner program. Install that first. The second was a VX manager software that can be used to update the firmware on the Nano. The third file was called Toyota Launcher that was very hard to download because my virus software thought it was infected. Its not, but you have to disable all your virus protectors to get it to download. Once downloaded and installed you run the Toyota Launcher and it lets you use the Techstream software without a Toyota dealer logon. Hope this info helps others get the Nano up and running.

 

You nailed it with the exception of saying down, thanks!