TAS2-A078
TAS2_a078_pressureSigVTooHigh
Also written as TAS2_A078 / TAS2 A078 / TAS2_a078_pressureSigVTooHigh / tas2_a078_pressuresigvtoohigh
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-A078 mean?
Tesla alert code in the Thermal Architecture System v2 (TAS2) module. The Tesla Air Suspension Controller (TAS) supplies the system pressure sensor (located in the valve block) with 5V, and observes the analog pressure signal voltage to evaluate the pressure. In normal operation of the pressure sensor, the signal should range from approximately 10-90% of the supply voltage. Set: The gallery pressure sensor signal is above 96% the supply voltage (nominally 5V). voltage > 4.8 V Clear: The gallery pressure sensor signal is below 96% the supply voltage (nominally 5V). voltage < 4.8 V 96% corresponds to ~22.4 bar To convert from percent to bar: p(bar) = 23.7248 * p(percent) - 1.375
Original Description
The Tesla Air Suspension Controller (TAS) supplies the system pressure sensor (located in the valve block) with 5V, and observes the analog pressure signal voltage to evaluate the pressure. In normal operation of the pressure sensor, the signal should range from approximately 10-90% of the supply voltage. Set: The gallery pressure sensor signal is above 96% the supply voltage (nominally 5V). voltage > 4.8 V Clear: The gallery pressure sensor signal is below 96% the supply voltage (nominally 5V). voltage < 4.8 V 96% corresponds to ~22.4 bar To convert from percent to bar: p(bar) = 23.7248 * p(percent) - 1.375
Affected Tesla Models
What You May Notice
- Thermal Architecture System v2 alert: The Tesla Air Suspension Controller (TAS) supplies the system pressure sensor (located in the valve block) with 5V, and
- 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-A078 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.