SCM-F027
SCM_f027_externalIsolationLow
Also written as SCM_F027 / SCM F027 / SCM_f027_externalIsolationLow / scm_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 SCM-F027 mean?
Tesla fault code in the SCM (SCM) 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
- SCM alert: Alert may be shown on the supercharger while a car is charging. This alert may indicate an insulation breakdown or other
- Touchscreen may show an error for one or more apps or settings
- Feature may restore itself after a reboot
How to Diagnose and Resolve
- 1 Perform a soft reboot (hold both scroll wheels for ~10 seconds)
- 2 Check for pending OTA software updates
- 3 If the issue persists, schedule a service appointment
Severity Notes
SCM-F027 is classified as a Fault, indicating a critical issue in the SCM system. Do not continue driving and contact Tesla Service immediately.