CP family
CP_a074_failedToEstablishV2gComm
Charging equipment communication error
What does the CP_a074_failedToEstablishV2gComm alert mean?
The charge port (CP) electronic control unit (ECU) is unable to communicate with the electric vehicle supply equipment (EVSE).
What you'll see in your Tesla
- Charging equipment communication error
- Unplug via Mobile App or Touchscreen and retry
What triggers it
The CP ECU is unable to communicate with the EVSE.
When it clears
The CP ECU is able to communicate with the EVSE or the charge cable is removed from the charge port.
Potential impact
DC fast charging may be unavailable at Combined Charging System (CCS) charge stations.
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.