PPB family
PPB_a016_highSideRelayFault
Parking brake functions degraded
What does the PPB_a016_highSideRelayFault alert mean?
High side tractor solenoid short circuit detected.
What you'll see in your Tesla
- Parking brake functions degraded
- Parking brake may not apply or release
What triggers it
Hardware issue detected with the high side solenoid relay
When it clears
Reseting the ECU may clear the alert, otherwise replacement may be required
Potential impact
Loss of tractor/trailer functionality
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.