TAS2-A227
TAS2_a227_PWMfastDetectFR
Also written as TAS2_A227 / TAS2 A227 / TAS2_a227_PWMfastDetectFR / tas2_a227_pwmfastdetectfr
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-A227 mean?
Tesla alert code in the Thermal Architecture System v2 (TAS2) module. Alert is set to indicate that the front right (FR) height sensor temporarily faulted when 100%, 0%, or a large delta in the duty cycle was read from the front left (FL) pulse width modulation (PWM) height-sensor. Duty cycle of 100% indicates an open circuit. Duty cycle of 0% indicates a short to ground. The alert will clear when one second of expected values is received from the FL height-sensor.
Original Description
Alert is set to indicate that the front right (FR) height sensor temporarily faulted when 100%, 0%, or a large delta in the duty cycle was read from the front left (FL) pulse width modulation (PWM) height-sensor. Duty cycle of 100% indicates an open circuit. Duty cycle of 0% indicates a short to ground. The alert will clear when one second of expected values is received from the FL height-sensor.
Affected Tesla Models
What You May Notice
- Thermal Architecture System v2 alert: Alert is set to indicate that the front right (FR) height sensor temporarily faulted when 100%, 0%, or a large delta in
- 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-A227 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.