CHG-U002
CHG_u002_LineImpedanceTooHigh
Also written as CHG_U002 / CHG U002 / CHG_u002_LineImpedanceTooHigh / chg_u002_lineimpedancetoohigh
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-U002 mean?
Tesla unknown code in the Charger (CHG) module. The line impedance is too high, or the line voltage is dropping significantly from another source drawing current on the same circuit. If this alert is present, the voltage, which is monitored continuously during charging, has dropped by 14% or more for a period longer than 1 second from the initial voltage sample value that was taken at the beginning of charge before current started flowing and the vehicle will not be able to charge.
Original Description
The line impedance is too high, or the line voltage is dropping significantly from another source drawing current on the same circuit. If this alert is present, the voltage, which is monitored continuously during charging, has dropped by 14% or more for a period longer than 1 second from the initial voltage sample value that was taken at the beginning of charge before current started flowing and the vehicle will not be able to charge.
Affected Tesla Models
What You May Notice
- Charger alert: The line impedance is too high, or the line voltage is dropping significantly from another source drawing current on the
- 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-U002 is a diagnostic or informational code in the Charger system. Typically no immediate action is required.