2020 Ttanium Hybrid/2009 Limited Hybrid/1978 F-250 Custom
Your high voltage battery should not be drained dry a couple times a week... much less ever.Thank you! We should be doing the back pressure test this morning some time. The HEV side appears to be functioning normally and I can "taxi" around in car parks and at slow speeds for a few mins on full HEV mode. I've learned that the FEH will perform like garbage if the HVTB appears empty (on the display) This has been a big help as, at least I know what is causing the slump and that it is easily recoverable after driving for a few minutes and getting a charge into it. I haven't managed to determine what causes it to occasionally empty out. It seems to happen once or twice a week. The FEH is garaged and not overly hot/cold when I start it. So, that helps when it comes to it really dragging and struggling after a cold start.
I still feel that it could perform better in general but it's acceptable at the moment. Lovely to cruise around in on flat city streets! I have ForScan and a USB ODB reader - that works great for running tests and pulling codes etc. If there are any stats/logs that you think would be useful for me to gather - please let me know and I'll get them.
You may have bad cells, or a faulty regeneration system.
there are write ups here on how to disassemble, diag, and rebuild your hvtb
dont know if your dtc scan tool can see/test your regeneration sys