DIS-W166
DIS_w166_hvilOutOfBounds
Also written as DIS_W166 / DIS W166 / DIS_w166_hvilOutOfBounds / dis_w166_hviloutofbounds
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does DIS-W166 mean?
Tesla warning code in the Drive Inverter Secondary (DIS) module. The secondary drive invertor (DIS) has detected the high voltage interlock loop (HVIL) voltage is outside of specified range. Note: This alert can be falsely triggered then the DIS is outputting higher torque. This alert alone is not enough to identify that there is an HVIL issue.
Original Description
The secondary drive invertor (DIS) has detected the high voltage interlock loop (HVIL) voltage is outside of specified range. Note: This alert can be falsely triggered then the DIS is outputting higher torque. This alert alone is not enough to identify that there is an HVIL issue.
Affected Tesla Models
What You May Notice
- secondary inverter warning: The secondary drive invertor (DIS) has detected the high voltage interlock loop (HVIL) voltage is outside of specified r
- Reduced acceleration or "Reduced Power" message on the touchscreen
- Higher than normal energy consumption during driving
How to Diagnose and Resolve
- 1 Reboot the vehicle by holding both scroll wheels
- 2 Avoid aggressive acceleration until the alert clears
- 3 Schedule a Tesla Service appointment within the next few days
- 4 Check for available OTA updates in Controls > Software
Severity Notes
DIS-W166 is a Warning in the Drive Inverter Secondary system. Schedule service soon. Monitor your vehicle for additional warnings.