Diagnose & Repair: Tesla Model S HV Insulation Fault (BMS_W142 & BMS_F123 Codes)
Hey everyone, welcome back! Today, we're tackling a serious issue with the Tesla Model S: a high voltage (HV) insulation fault. This isn't just a minor glitch; it's a critical safety issue that prevents the car from driving or charging. You'll likely see warning messages like BMS_W142_SW_Isolation_Degradation and BMS_F123_SW_Internal_Isolation in service mode. In this video, we'll walk you through the process of diagnosing and pinpointing the exact location of this tricky fault within the battery pack. Let's dive in!
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