EFUSE_w127
EFUSE_w127_vBatFusedEFuseTrip
What does EFUSE_w127 mean?
Tesla warning code in the Electronic Fuse (EFUSE) module. This alert will trigger when the vbat-fused high current E-fuse upstream of the air compressor E-fuse internal to the E-fuse module is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current into the air compressor or a short circuit event has occurred at the air compressor output of the E-fuse. Another possibility is that a long current event, which exceeds the current carrying capability of the cable, has occurred. Once the E-fuse is tripped (turned off), the air compressor will measure ~0V.?
Original Description
This alert will trigger when the vbat-fused high current E-fuse upstream of the air compressor E-fuse internal to the E-fuse module is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current into the air compressor or a short circuit event has occurred at the air compressor output of the E-fuse. Another possibility is that a long current event, which exceeds the current carrying capability of the cable, has occurred. Once the E-fuse is tripped (turned off), the air compressor will measure ~0V.?
Severity Notes
EFUSE_w127 is a Warning in the Electronic Fuse system. Schedule service soon. Monitor your vehicle for additional warnings.
Other EFUSE Codes
View all EFUSE 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.