CHGS-F118
CHGS_f118_VDiffHwRationality
Also written as CHGS_F118 / CHGS F118 / CHGS_f118_VDiffHwRationality / chgs_f118_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 CHGS-F118 mean?
Tesla fault code in the CHGS (CHGS) module. The Voltage Differential Rationality Check fails, which is possibly due to a failed isolator between the phases or a failed signal line for the voltage differential.This alert can be present when the contactors are closed or opened.
Original Description
The Voltage Differential Rationality Check fails, which is possibly due to a failed isolator between the phases or a failed signal line for the voltage differential.This alert can be present when the contactors are closed or opened.
Affected Tesla Models
What You May Notice
- CHGS alert: The Voltage Differential Rationality Check fails, which is possibly due to a failed isolator between the phases or a fai
- 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
CHGS-F118 is classified as a Fault, indicating a critical issue in the CHGS system. Do not continue driving and contact Tesla Service immediately.