CHG-W118
CHG_w118_VDiffHwRationality
Also written as CHG_W118 / CHG W118 / CHG_w118_VDiffHwRationality / chg_w118_vdiffhwrationality
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-W118 mean?
Tesla warning code in the Charger (CHG) module. The Voltage Differential rationality check fails possibly due to a failed isolator between phases or a failed signal line for the voltage differential. This alert can affect the ability to supercharge when aligned with the alert BMS_A096_FC_NO_VOLT_MATCH. This alert does not seem to affect AC charging. It can be present when the contactors are closed or opened.
Original Description
The Voltage Differential rationality check fails possibly due to a failed isolator between phases or a failed signal line for the voltage differential. This alert can affect the ability to supercharge when aligned with the alert BMS_A096_FC_NO_VOLT_MATCH. This alert does not seem to affect AC charging. It can be present when the contactors are closed or opened.
Affected Tesla Models
What You May Notice
- Charger alert: The Voltage Differential rationality check fails possibly due to a failed isolator between phases or a failed signal lin
- 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-W118 is a Warning in the Charger system. Schedule service soon. Monitor your vehicle for additional warnings.