GTW_w157
GTW_w157_lowVoltageSupportFault
What does GTW_w157 mean?
Tesla warning code in the Gateway (GTW) module. There has been an issue in providing support to the low voltage (LV) bus, and the voltage has dropped below the target. This can be caused by: Wiring issues between the DCDC and rest of vehicle on LV harness (B+ or ground).Loose 12V battery positive or negative connections at either end of the harness.No LV support provided due to low Battery Management System (BMS) State of Charge (SOC).No LV support provided due to BMS issues.No LV support provided due to DCDC issues.No LV support provided due to E-fuse DCDC fuse tripped.DCDC is not enabled by the BMS or E-fuse.Controller area network (CAN) bus issues with PT or BDY. This alert does not mean the 12V battery is bad. It means the vehicle is not adequately supporting the 12V battery and LV system.
Original Description
There has been an issue in providing support to the low voltage (LV) bus, and the voltage has dropped below the target. This can be caused by: Wiring issues between the DCDC and rest of vehicle on LV harness (B+ or ground).Loose 12V battery positive or negative connections at either end of the harness.No LV support provided due to low Battery Management System (BMS) State of Charge (SOC).No LV support provided due to BMS issues.No LV support provided due to DCDC issues.No LV support provided due to E-fuse DCDC fuse tripped.DCDC is not enabled by the BMS or E-fuse.Controller area network (CAN) bus issues with PT or BDY. This alert does not mean the 12V battery is bad. It means the vehicle is not adequately supporting the 12V battery and LV system.
Severity Notes
GTW_w157 is a Warning in the Gateway system. Schedule service soon. Monitor your vehicle for additional warnings.
Other GTW 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.