TAS2-A220
TAS2_a220_exhaustGalleryFault
Also written as TAS2_A220 / TAS2 A220 / TAS2_a220_exhaustGalleryFault / tas2_a220_exhaustgalleryfault
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-A220 mean?
Tesla alert code in the Thermal Architecture System v2 (TAS2) module. The alert checks for exhaust gallery faults every 100ms. Set: After an exhaust procedure, gallery pressure stays above 5 Bar. Clear: After an exhaust procedure, gallery pressure decreases below 5 Bar. Note: An exhaust procedure is considered completed if one of the following is true: After opening the exhaust valve, gallery pressure has been constant within +/- 0.05 Bar for 50ms.The exhaust valve has been open for more than 2.5 seconds.The gallery is the volume within the valve block that gets pressurized prior to filling the reservoir or an air spring. The gallery is where the pressure sensor measures pressure when other components open their valves to connect to the gallery. The gallery is exhausted to atmosphere after a filling or a pressure check operation to reduce stress on the system. This is done by closing all valves except the exhaust valve, allowing the gallery pressure to decrease. The decrease in gallery pressure is limited by an internal check valve in the compressor, which is rated above atmospheric pressure.
Original Description
The alert checks for exhaust gallery faults every 100ms. Set: After an exhaust procedure, gallery pressure stays above 5 Bar. Clear: After an exhaust procedure, gallery pressure decreases below 5 Bar. Note: An exhaust procedure is considered completed if one of the following is true: After opening the exhaust valve, gallery pressure has been constant within +/- 0.05 Bar for 50ms.The exhaust valve has been open for more than 2.5 seconds.The gallery is the volume within the valve block that gets pressurized prior to filling the reservoir or an air spring. The gallery is where the pressure sensor measures pressure when other components open their valves to connect to the gallery. The gallery is exhausted to atmosphere after a filling or a pressure check operation to reduce stress on the system. This is done by closing all valves except the exhaust valve, allowing the gallery pressure to decrease. The decrease in gallery pressure is limited by an internal check valve in the compressor, which is rated above atmospheric pressure.
Affected Tesla Models
What You May Notice
- Thermal Architecture System v2 alert: The alert checks for exhaust gallery faults every 100ms. Set: After an exhaust procedure, gallery pressure stays above 5
- 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-A220 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.