SCS-F027
SCS_f027_externalIsolationLow
Also written as SCS_F027 / SCS F027 / SCS_f027_externalIsolationLow / scs_f027_externalisolationlow
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 SCS-F027 mean?
Tesla fault code in the Safety Constraint System (SCS) module. Alert may be shown on the supercharger while a car is charging. This alert may indicate an insulation breakdown or other loss of isolation resistance in one of the following:The DC cabling between the supercharger and the car.The DC cabling between the charge port and high voltage junction box (HVJB), If while charging, anywhere inside the vehicle's high voltage DC system.
Original Description
Alert may be shown on the supercharger while a car is charging. This alert may indicate an insulation breakdown or other loss of isolation resistance in one of the following:The DC cabling between the supercharger and the car.The DC cabling between the charge port and high voltage junction box (HVJB), If while charging, anywhere inside the vehicle's high voltage DC system.
Affected Tesla Models
What You May Notice
- Safety Constraint System alert: Alert may be shown on the supercharger while a car is charging. This alert may indicate an insulation breakdown or other
- Top speed or acceleration may be reduced
- Notification in the Tesla app about a safety limitation
How to Diagnose and Resolve
- 1 Reboot the vehicle to attempt to clear the constraint
- 2 Check for OTA software updates
- 3 Schedule service if the limitation persists
Severity Notes
SCS-F027 is classified as a Fault, indicating a critical issue in the Safety Constraint System system. Do not continue driving and contact Tesla Service immediately.