GTW-W177
GTW_w177_dead12VBattery
Also written as GTW_W177 / GTW W177 / GTW_w177_dead12VBattery / gtw_w177_dead12vbattery
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 GTW-W177 mean?
Tesla warning code in the Gateway (GTW) module. The 12V battery voltage has dropped below 10.5V for at least 5 seconds. If this alert is present, the 12V battery has likely become damaged through excessive discharge and should be replaced. The root cause of this damage should also be diagnosed and repaired to prevent future occurrences in the new battery. The flooded batteries used on Model X vehicles are especially sensitive to deep discharge, which can result in failures developing weeks or months later even if the battery looks fine initially.
Original Description
The 12V battery voltage has dropped below 10.5V for at least 5 seconds. If this alert is present, the 12V battery has likely become damaged through excessive discharge and should be replaced. The root cause of this damage should also be diagnosed and repaired to prevent future occurrences in the new battery. The flooded batteries used on Model X vehicles are especially sensitive to deep discharge, which can result in failures developing weeks or months later even if the battery looks fine initially.
Affected Tesla Models
What You May Notice
- Gateway alert: The 12V battery voltage has dropped below 10.5V for at least 5 seconds. If this alert is present, the 12V battery has li
- One or more features may temporarily be unavailable
- Usually resolves after a reboot
How to Diagnose and Resolve
- 1 Perform a soft reboot (hold both scroll wheels)
- 2 Check for pending OTA software updates
- 3 Schedule service if the alert recurs frequently
Severity Notes
GTW-W177 is a Warning in the Gateway system. Schedule service soon. Monitor your vehicle for additional warnings.