RCM family
RCM_a090_comPartyBusOff
Safety restraint system issue
What does the RCM_a090_comPartyBusOff alert mean?
RCM_a090_comPartyBusOff
What you'll see in your Tesla
- Safety restraint system issue
- Service is required
What triggers it
CAN bus hardware fault.
When it clears
No CAN bus hardware fault present.
Potential impact
The restraint system may not function as designed.
Affected models
Model 3 2017-2023
Model Y
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.