After doing a lot of very slow charging to recover my battery pack, I now get the BSM: V_ess too low during precharge error. It happens when trying to charge and when trying to drive. The battery is good, lowest brick is 3.97V highest is 4.00V. Pack voltage is 395V. But in the service screen the PEM has only 254V. That sounds like a problem! I'm thinking a resistance between the ESS and PEM?