IAPU family
IAPU_a037_hwInternalFailure
Air dryer error detected
What does the IAPU_a037_hwInternalFailure alert mean?
Internal hardware failure occurred.
What you'll see in your Tesla
- Air dryer error detected
- Service is required
Potential impact
No electronic governing or regeneration, no pressure information, possible damage of pneumatic components
Affected models
Semitruck
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.