TAS2-A221
TAS2_a221_valveLeakDetected
Also written as TAS2_A221 / TAS2 A221 / TAS2_a221_valveLeakDetected / tas2_a221_valveleakdetected
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 TAS2-A221 mean?
Tesla alert code in the Thermal Architecture System v2 (TAS2) module. This alert indicates that the gallery (the shared air volume within the valve block) is observing an increasing pressure reading with all valves commanded closed.
Original Description
This alert indicates that the gallery (the shared air volume within the valve block) is observing an increasing pressure reading with all valves commanded closed.
Affected Tesla Models
What You May Notice
- Thermal Architecture System v2 alert: This alert indicates that the gallery (the shared air volume within the valve block) is observing an increasing pressure
- Reduced charging speed in cold weather or battery pre-conditioning required
- HVAC performance may be slightly affected
How to Diagnose and Resolve
- 1 Reboot the vehicle
- 2 Check coolant levels if accessible (Model S/X only)
- 3 Avoid DC fast charging until battery temperature normalizes
- 4 Schedule service if the alert appears in warm ambient conditions
Severity Notes
TAS2-A221 is an Alert in the Thermal Architecture System v2 system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.