CHG_w125
CHG_w125_leakageTestFailure
What does CHG_w125 mean?
Tesla warning code in the Charger (CHG) module. This fault indicates that the voltage decay after the supercharger external isolation test has happened too quickly. During supercharger startup, the supercharger will open the output contactors after performing the external isolation test at 300V. The vehicle then monitors the time it takes for the 300V to decay. If the decay time is sufficient, the start-up sequence proceeds. The purpose of this test is to check the common mode isolation (DC+ to DC-) of the high voltage chain from the supercharger cabinet to the vehicle's fast charge contactors.
Original Description
This fault indicates that the voltage decay after the supercharger external isolation test has happened too quickly. During supercharger startup, the supercharger will open the output contactors after performing the external isolation test at 300V. The vehicle then monitors the time it takes for the 300V to decay. If the decay time is sufficient, the start-up sequence proceeds. The purpose of this test is to check the common mode isolation (DC+ to DC-) of the high voltage chain from the supercharger cabinet to the vehicle's fast charge contactors.
Severity Notes
CHG_w125 is a Warning in the Charger system. Schedule service soon. Monitor your vehicle for additional warnings.
Other CHG 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.