Hi 2014 C 170K miles. Pull over hybrid battery warning when temps were at 5* F. Now in 30s rarely get it. Just received the Autel Maxiap AP2500. Great tool, happy with it. the app reports the hybrid battery needs balancing. Is that viable ? Something to invest in OR buy a new hybrid battery from Ennocar direct ? TIA Jack
There is no need to change everything at once and tear your hair out. Can you attach the application report? Or a photo of the problem detected?
P0A80 - replace the battery. Very scanty information. Of course, you can change the entire battery, throwing a couple of thousand out of your budget, but first it is better to find out what caused this code. You need additional codes removed by special devices compatible with the Toyota protocol. Voltage of pairs of modules under load?
Autel did NOT give any more codes. Dr. Prius, Carista with paid for enhanced abilities, OBD Fusion (confusing) nor Autel Maxiap Diag gives any more info. I use my C for deliveries, in town and a few days for 100 mile radius deliveries. Car works best when I don’t run the heat. tia Jack
Yes, Dr. Prius reports’ changes, doesn’t stay that way. Some event Triggers the pull over warning & P0A80. I bought the Autel Maxiap diag & obd2 dongle based on priuschat recommendations. Being Toyota aware. J
The battery condition of the freeze frame of the doctor Prius is normal. The only drawback is the high temperature of the battery. This may be caused by dirt and fluff in the ventilation duct of the high-voltage battery. Have you cleaned the ventilation grille at the entrance to the ventilation duct lately?
The Dr Prius screenshot is NOT normal. For a healthy battery pack, the Delta SOC should be 0.0%. Yours is showing a Delta SOC of 42.5%. Delta SOC is the state of charge difference between the best and worst battery block. A battery block consists of two battery modules. A top balance of the battery pack with a grid charger may help to reduce the Delta SOC. Has any work been done on the hybrid battery?
This is not an application from Toyota Techstream. This is a program that does not have open source. Aren't we too trusting programs made on the knees? The physical meaning of the SOC delta is in the large difference in charge between pairs of modules. Is it really as the program says? On the freeze frame, the minimum voltage is 16.62, the maximum is 16.7. The difference between them is 0.08V Less than 0.5% Is the freeze frame the same when the error was detected and what preceded it? In this case, it is more objective to use the Hybrid Assistant. It takes a graph during the discharge or charge process and the difference between pairs of modules is clearly visible.
J post a DrPrius screenie before you start your daily work, right after you put your C in ready mode. Preferably after sitting all night in sub freezing temps. than, next time you get the pull over and Triangle of Death, after pulling over, grab a DrPrius screenie of the packs condition before doing anything else, if possible.
If a 2014 Prius c showed a P0A80 in front of me I'd just replace the hybrid battery, no need to mess around.
The Dr Prius app is just retrieving some of the parameters that are in the Hybrid Control ECU and the HV battery ECU and presents it in a user friendly GUI. The Delta SOC is a Toyota parameter that is in one of the two ECUs. It is not created by the Dr Prius app. I have uploaded one page of the Gen 2 Hybrid Battery System manual as a PDF. You will see that Delta SOC is one of the parameters that is included in the freeze frame data. Here is a link to Techstream freeze frame data that was included in a different thread for a Gen 3 Prius. The Delta SOC is on page three of the PDF. https://attachments.priuschat.com/attachment-files/2024/08/253941_Freeze_Frame_Data_08-03-24.pdf Delta SOC is not the same as the voltage difference between the battery blocks.They are two different parameters. When the Delta SOC is more than 0%, it means that the battery blocks are not balance to each other. Toyota says that Delta SOC should not exceed 20%. See second PDF uploaded below. Adventurer2112's HV battery has a Delta SOC of 42.5%. To reduce the Delta SOC, a grid charger should be used to top balance the battery pack. After the battery blocks are balanced to each other, than he should not see the P0A80 code again.
Rather then taking the two Dr Prius screenie that you requested, take a look at the freeze frame data for the P0A80 code. Then you can see all the data seconds before the trouble code was triggered, and the data when the trouble code was triggered. Edit: A link to P0A80 freeze frame data for a Gen3 Prius is shown in my post #15. If you look at that PDF, the columns marked as "-3", "-2", "-1", are the data just before the trouble code is triggered. The "0" column is the data when the trouble code is triggered. The column "1" is the data just after the trouble code is triggered.
