Hello all, My first thread and Prius. I just purchased a 2010 Prius with 230K miles. Drove it home even though it had a P0A80 code. I purchase it from the original owner and planned on "fixing" the battery. I replaced 3 cells in a friends Gen II and it has worked great every since. When testing my friends Gen II cells, 3 stuck out with at least 0.5 less volts than the others. I pulled this Gen III pack out and all the cells were withing .06 volts (7.95-8.01). There was some corrosion on the bus bars, but all contacting areas in including the sensor connectors appeared good. The fan and ducting was ok. After helping my friend, I figured this an easy fix........................................................ What would you suggest for the next step? Thank you in advance for your help and time!
Some ideas: - With battery properly mounted in the car, watch the voltage data live with an app or Techstream to see what is happening under load. - Record the data and analyze it for anomalies. - Look at other info like delta SOC to see if there are other issues at play. - Take the battery out and inspect it on the bench. - Look very carefully every voltage sensing wire. Probing them vigorously at the crimp connections. - Check for corrosion at the connector that goes into the hybrid battery computer, including the pins of the computer itself. - Check the terminals to be sure they are properly torqued. - Load test individual cells and see if there is variance.
