CHG-U001
CHG_u001_LineImpedanceHigh
Also written as CHG_U001 / CHG U001 / CHG_u001_LineImpedanceHigh / chg_u001_lineimpedancehigh
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 CHG-U001 mean?
Tesla unknown code in the Charger (CHG) module. The line impedance is high or the line voltage is dropping significantly from another source drawing current on the same circuit. If this alert is present, the charging current is reduced by 25%.
Original Description
The line impedance is high or the line voltage is dropping significantly from another source drawing current on the same circuit. If this alert is present, the charging current is reduced by 25%.
Affected Tesla Models
What You May Notice
- Charger alert: The line impedance is high or the line voltage is dropping significantly from another source drawing current on the same
- Charging notification in the Tesla app
How to Diagnose and Resolve
- 1 Reboot the vehicle and retry charging
- 2 Try a different cable or Wall Connector
- 3 Schedule service if AC charging consistently underperforms
Severity Notes
CHG-U001 is a diagnostic or informational code in the Charger system. Typically no immediate action is required.