Have Toyota Questions? Ask a Mechanic for Answers ASAP
Thank you for trusting us with your questions. Is the code possibly P0a80 Rather than pa080?
Yes, you did, and I make sure I have accurate information before answering your question. That way, I make sure to give you the BEST information. First thing to check, as there is a service bulletin for this condition, is the cooling fan and ducts. Make sure they are clean and free of debris. Also, make sure the cooling fan is operating. If that checks out, since your battery cell voltages do not vary by more than .3 volts, you will need to replace the battery ECU. This is based on both my personal all experience and the Toyota repair manual diagnostics.