EFUSE-W159
EFUSE_w159_revBattFaulted
What does EFUSE-W159 mean?
Tesla warning code in the Electronic Fuse (EFUSE) module. This alert is intended to show that the 12V battery was connected in reverse-polarity (negative post to positive harness and vice-versa) but can trigger during normal operation, which is not expected and is currently being investigated. For now, this alert can be ignored. This alert triggered if the reverse battery E-fuse is tripped. It is sometimes triggered along with EFUSE_w148_cabinOverCurrent and EFUSE_w147_frunkOverCurrent as well.
Original Description
This alert is intended to show that the 12V battery was connected in reverse-polarity (negative post to positive harness and vice-versa) but can trigger during normal operation, which is not expected and is currently being investigated. For now, this alert can be ignored. This alert triggered if the reverse battery E-fuse is tripped. It is sometimes triggered along with EFUSE_w148_cabinOverCurrent and EFUSE_w147_frunkOverCurrent as well.
Severity Notes
EFUSE-W159 is a Warning in the Electronic Fuse system. Schedule service soon. Monitor your vehicle for additional warnings.