I recently purchased a 2008 Prius w/ 202k that had been sitting for approximately 1 year. I went to check it out and managed to get to the battery to jump it and car started up but had the CEL, Red Triangle, TCS lights on as well as the P0AFA + P3000 codes on. The car stayed on all motor and never shut off, the hybrid system showed all but 2 lines at BLUE and still ran, felt sluggish but would still run. I have not had a chance to look at it as its getting towed to my house tomorrow but I wanted to check with all my Prius GURUS on what you all recommend I look at before determining it to be a dead HV battery. Doing a quick search on the codes, I read some saying possible cause for those codes others than a bad HV battery were: wiring issue at HV battery, inspect HV ECU for broken/burnt pins as well as the harness and loose connectors. I also read on here somewhere from a post that it is possible to "jump start" or charge up dead cells but you need a specific "program"? Not sure if that is in fact true but if so, what would that program be (tech-stream??)? Extra info: - 12v battery did not hold a charge even after 30 minutes of leaving car on - HV battery replaced by owner in 2018 Any and all info would be greatly appreciated.
What method or device were the error codes obtained. To understand the further process. P3000? May have subcodes. Code P3000 | PriusChat P0AFA There was technical information about problems in the ECU. https://priuschat.com/attachments/t-sb-0166-09-pdf.32383/ Another topic with a possible reason P0AFA, Engine Won't Turnover [solved] | PriusChat
I used a Blue Driver OBD2 scanner. The only codes were P3000 and P0AFA. But upon reading the last link you sent me it gives me much more hope that this "could" be a corrosion issue at the wires or worst case scenario a bad Hybrid Battery ECM needing replacement which if so, should be about $75-$100 (according to Ebay) and not the HV battery itself. I will download the Dr.Prius app as well as the OP mentioned and read the battery voltages and report. Any other ideas?
This is often the weakest option. Lots of fakes. Hybrid battery diagnostic and repair tool for Toyota and Lexus Take a look at these options instead. Gen2 OBD2 app review | PriusChat
When you lift the hood of the hybrid battery everything should be pretty obvious what's happening corrosion and possible orange plug on the battery ECU break open that ECU clean all the bus bars if the pins are good and the receptacle portion of the ECU clean it all up with contact cleaner Make sure you clean the plug that goes in that receptacle and see what you have then and of course any bus bar and corrosion on the nuts should be dealt with it this time while the battery is open I just did this on an '08 when I got it a few months ago made all the difference in the world and the battery was old and it ran another three or four months and then I found almost brand new HV battery and a junkyard or somebody had just replaced the battery in the brake actuator went out so I got that battery for free and put it in the '08 we're talking about and it's been running great ever since Greens up all the time runs great 45 mph gallon.
So every time I read "orange plug" it refers to the one that goes into the hybrid battery ECU and NOT the orange SAFETY/SERVICE plug that you disconnect any time you are working on the electrical side of things right? Now, I was going to check the connectors as you mentioned as it's what everyone else seems to be doing and @MAX2 has provided very useful links with photos and all. I last worked on my old 2008 over a year ago and recalled removing the orange service plug before working on the electrical (since I replaced the ABS actuator) and did left it off overnight along with disconnecting battery to avoid any potential shock and some said it might be overkill but rather safe than sorry. What exactly does the manual say is the recommended step to ensure all electrical systems are discharged when working with/at or near the electrical on these? I just downloaded Dr.Prius as well and how does this work? Will it pair up with my BlueDriver when connected on the vehicle and do I need wifi to use it or just bluetooth as I have the BlueDriver connected to my iPad but when on the go, I don't have internet but can still use it since its solely bluetooth driven.
If you're going to be working on anything with bright orange wires on it (the traction battery, the inverter, the transaxle, the A/C compressor), you pull the orange service plug from the battery and wait several minutes. If you won't be messing with any of those systems, just approach it like any other car.
