Prius wouldn't start

So I'm gonna go ahead and replace the CM because I now have to jump the car every single time I try to use it. The CM just won't turn on without a jump start now, so it's definitely that.

 

Hey all so here's a small update: so I thought that the combo meter was bad. After doing some backtrack, I found out that I forgot to plug in the cable that connects the dash display to the combo meter to show me the info. However, there's some bad news with this. This unfortunately didn't fix my issue. The display immediately shuts down when I turn off the car. I did look at the original board & there appears to be nothing wrong with it as it looks just as good as the refurb board that I received today. So now the only thing I can think of is that there's a bad fuse or something else.

 

Hey all, so I was finally able to get the car back working again. Apparently the computer had me test the parking brake for some weird reason. However, after that was completed the car was finally able to start up without the help of my portable jump starter. I seriously thought that the fuse was bad, but apparently its not as I haven't received stating 'There is a problem with the transmission 'P' lock mechanism'. It's weird though because the old combo meter looked way better than the guy from Youtube. In fact I took a couple of seconds to look at the old one and didn't notice anything out of the ordinary. Overall, im happy to have my prius back and working and looking forward to driving it more (not to mention saving gas with it compared to my truck).

 

So here's a small update on my end: I just got done being at AutoZone & I found out that my battery is fine, just needs a charge. They said that the state of the charge is at 50%, so when I get back home, I'm gonna take the battery to my local AutoZone & have them put it through a slow charge cycle.

 

Ok so this should be the final update: I found out that my battery was purchased last year by my mom (it used to belong to her) and the battery came from O'Reillys, so I went by there to get a complete understanding of the process of slow charging. Originally I would've kept the battery there until almost closing time. However, by a freak incident where I accidently left the negative cable attached, somehow the guy at O'Reillys made contact with the wrench with the positive terminal (maybe some kind of corrosive material went from the negative terminal to the positive), but needless to say it caused multiple sparks & I guess this was a safety hazard, which warranted them to give me a brand new battery on the spot. Thankfully they happened to have one in stock (just my luck as these are difficult to come by now n days). The guy said that it stays under the original warranty, so I have about 2 years left on the new battery. So I connected the new battery based on how they enlightened me in terms of how to connect the battery and how I'm gonna have to give the computer time to recognize the new battery. Overall I'm thinking that this fixed the remainder of my overall issues, but honestly I'm probably gonna stay a little weary (especially based on all the hassle I've had to deal with on these issues as of lately).

On a side note, what I don't get is how a regular 12v battery loses that much charge within maybe around a year of ownership. All I can think of is possible poor workmanship (putting the battery together possibly in a shotty way) or some sort of faulty mechanics. My understanding is that these lead acid batteries in general are supposed to last easily past their warranty period. /rant

 

Hey all, just wanted to give a small update and ask a brief question. So for the most part the car is running fine. However, I've noticed that the computer would end up resetting itself in terms of the mpg stats since the battery change. This happens at random points since the new battery installation. Should I just be patient with the process or should I look into something? I know I didn't have this issue with my older '05 prius when I had to change out the battery on it.

 

Hey all heres a small update: so I literally just came back from my local dealership and they helped me figure out which bolt was needed to secure the negative cable to the ground hole. I did find out that I had the correct bolt in there and apparently ran out of patience the first time as I was able to get the bolt tight into the hole. However, as soon as I got home, that didn't appear to fix the issue as it still continues. Also I don't see a reason to put in the extra effort to move both the 'clamps' all the way down to the bottom of the 12v battery as both are very secure.

 

Hey all, so FINALLY I just received news that my hybrid battery pack arrived (I was originally told 3 weeks, but took just over 2 months). So now the question becomes over the oil and the gas in my car since my prius has been sitting for over 6 months waiting for the new battery. I recently saw a video from Scotty talking about how the oil can sit there for some time, but yet the gas is a different situation. I won't be installing the battery today because I need to install new lift struts for the hatchback door.

 

So I started the process of getting the part that attaches to the battery pack connected & its definitely been an interesting learning experience for sure. Based on how everything looks, I should be able to get the battery pack into the car tomorrow & check everything out from there. In terms of the old bus bars, they're definitely gonna go back with the old battery pack, which makes sense. There's some extra connectors and possibly cables that I'm confused by, so I'll be posting those tomorrow. Also I went ahead & ordered new struts for the hatch since the original ones have already failed (I figured as much since the hatch has been sitting open for over half a year). Hopefully once I put the new battery pack in, the car will begin to run like normal again.

 

Ok so here's an update on my end: so the new hybrid battery pack is in. I just installed a brand new battery today & now I'm getting a P0AC2 code. I only see one video on Youtube talking about the ECU module and somehow their module got burned out. So while I do check on the ECU module itself, I'm open to any other ideas on what to check.

 

So this cable is the ONLY thing that seems to be keeping my Prius from running. However, I can't seem to find the connection point that it's supposed to go to. Any ideas?

 

Yes I just posted it above, but Ill type it again. P0AC2, Hybrid Battery Pack Current Sensor 'A' Circuit High. I'm not sure if this connector that I uploaded a photo of is supposed to connect to anything because everything else is connected properly. I'm really confused as to what the issue might be. I've read in the forums where others just cleared the codes, but I'm not really sure if I should try to do that with this code or not.