CP family
CP_a010_pilotRationality
Charging equipment communication error
What does the CP_a010_pilotRationality alert mean?
The charge port (CP) electronic control unit (ECU) receives pilot sensor readings that are outside of the expected range.
What you'll see in your Tesla
- Charging equipment communication error
- Try again or try different equipment
What triggers it
The CP ECU senses pilot voltage, period, or a duty cycle outside of the expected range that cannot be categorized into a valid pilot state.
When it clears
The CP ECU receives valid pilot voltage, period, and duty cycle readings, or the CP closes its single wire controller area network (SWCAN) relay.
Potential impact
Charging does not start.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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.