Dealer Wants $10,000...for THIS?? (Chevy Volt Not CHARGING: P0AA6)

Owner brought his low-mileage 2013 Chevy Volt over to PHAD for a second opinion. He says that the Volt is setting a "High Voltage Charging System Fault" and refusing to take a charge from the wall. The "DEATH CODE" set is a P0AA6 - EV Battery Isolation Lost. The dealer replaced a coolant level sensor, code came back, and then they quoted the customer over $10,000 to replace the main EV battery...which is Discontinued!! Let's follow the OEM Service Procedure and TSB to diagnose this fault. Can we get the Volt back to good health without breaking the bank? KINGBOLEN K10 (Updated THINKTOOL PROS) **ONLY $940 with COUPON!!** https://www.amazon.com/dp/B0BW8B4D9Y?... BOSCH Mastertech II J2534 VCI: https://www.amazon.com/dp/B08DH5B5JN?... TOPDON TOPSCAN: https://www.amazon.com/dp/B0C3QQYQ1B?... Enjoy! Ivan