Tesla Model S alerts codes

FC_w257 / FC_w257_GB_bmsMia

Alert Description
The vehicle is unable to begin GB (China) DC fast charging because the fast charge (FC) electronic control unit (ECU) detects that the battery management system (BMS) is unavailable (MIA).

Potential Impact
DC fast charging is unavailable.

Set condition
The FC ECU does not receive the expected CAN messages from the BMS within a certain time frame.

Clear condition
The FC ECU receives the expected controller area network (CAN) messages from the BMS.

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