BMS_f150
BMS_f150_SW_precharge_too_long
What does BMS_f150 mean?
Tesla fault code in the Battery Management System (BMS) module. If the contactors are trying to close and the Direct Current (DC) link voltage rise does not match a time constant with a 35% tolerance, then a precharge fault shall be asserted and precharge aborted. During the precharge sequence when the Battery Management System (BMS) is closing the contactors, the time it takes to reach target precharge voltage is too long. The precharge taking too long means that the voltage on the DC Link bus (vehicle side of contactors) rose slower than expected, similar to how if there was too much capacitance or resistance to chassis on the bus
Original Description
If the contactors are trying to close and the Direct Current (DC) link voltage rise does not match a time constant with a 35% tolerance, then a precharge fault shall be asserted and precharge aborted. During the precharge sequence when the Battery Management System (BMS) is closing the contactors, the time it takes to reach target precharge voltage is too long. The precharge taking too long means that the voltage on the DC Link bus (vehicle side of contactors) rose slower than expected, similar to how if there was too much capacitance or resistance to chassis on the bus
Severity Notes
BMS_f150 is classified as a Fault, indicating a critical issue in the Battery Management System system. Do not continue driving and contact Tesla Service immediately.
Other BMS Codes
Tesla alert codes sourced from the community-maintained Tesla Alerts Dictionary. This information is for educational purposes only. Always consult Tesla Service for official diagnosis and repairs.