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Tesla CP_a102

Unable to charge - Wall connection too hot Outlet or Wall Connector wiring must be checked

Common search variants: CPa102 · CP-a102 · CP a102 · Search ignores case and common separators.

DriveNot yet established by verified evidence.
ChargeCharging is slowed when this alert is present to protect the wiring and Wall Connector. Whether charging can continue or resume in a particular case is not yet established by verified evidence.
ServiceContact an electrician for inspection of the building wiring connection to the Wall Connector. Tesla vehicle service need is not established by the supplied verified evidence.
Confidence95%

Quick answer

Tesla alert CP_a102 means a high temperature was detected at the Wall Connector’s building connection. Charging is slowed to protect the wiring and Wall Connector; the supplied official information directs the owner to have an electrician inspect the building wiring connection.

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1. What does CP_a102 mean?

Tesla alert CP_a102 means a high temperature was detected at the Wall Connector’s building connection. Charging is slowed to protect the wiring and Wall Connector; the supplied official information directs the owner to have an electrician inspect the building wiring connection.

2. Technical explanation

Official Tesla owner-manual communications filed with NHTSA state that CP_a102 is triggered when the Wall Connector detects high temperature at its building connection. The alert indicates that the building connection is becoming too warm, and charging is slowed to protect the wiring and Wall Connector. The information states that this is not typically an issue with the vehicle.

3. What system is affected?

Wall Connector building wiring connection / charging equipment. It is not typically an issue with the vehicle, according to the supplied official Tesla information.

4. How serious is this code?

Severity is not explicitly classified in the supplied diagnostic record. The official information confirms a temperature-related charging protection response and directs inspection by an electrician.

5. Symptoms you may notice

  • CP_a102 alert: “Unable to charge - Wall connection too hot Outlet or Wall Connector wiring must be checked.”
  • High temperature detected by the Wall Connector at the building connection.
  • Charging is slowed to protect the wiring and Wall Connector.

6. Possible causes

  • The building wiring connection to the Wall Connector is getting too warm.
  • The supplied official information directs an electrician to verify that all wires are properly connected and torqued according to the Wall Connector installation guide. Specific underlying causes beyond that are not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Charging is slowed when this alert is present to protect the wiring and Wall Connector. Whether charging can continue or resume in a particular case is not yet established by verified evidence.

9. What you can safely do

  • Contact an electrician to inspect the building wiring connection to the Wall Connector.
  • Have the electrician ensure that all wires are properly connected and torqued according to the Wall Connector installation guide.
  • Do not attempt electrical wiring inspection, connection work, or torque work yourself.

10. Step-by-step troubleshooting

  1. Use the applicable Wall Connector installation guide as the reference for the electrician’s inspection.
  2. No additional owner-performed troubleshooting steps are established by the supplied verified evidence.

11. When to contact service

Contact an electrician for inspection of the building wiring connection to the Wall Connector. Tesla vehicle service need is not established by the supplied verified evidence.

12. What the service center may check

  • Inspect the building wiring connection to the Wall Connector.
  • Verify all wires are properly connected.
  • Verify connections are torqued according to the applicable Wall Connector installation guide.

13. Possible repair or resolution

  • The supplied official information indicates the issue can be fixed quickly by an electrician, but the exact repair required for an individual installation is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA manufacturer communications containing Tesla owner-manual guidance document CP_a102, including MC-10250484 (published 2023-12-01), MC-10250485 (published 2023-12-01), and MC-10253666 (published 2024-03-27). These communications describe the alert and direct an electrician to inspect the Wall Connector’s building wiring connection.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Tesla owner-manual communication: https://static.nhtsa.gov/odi/tsbs/2023/MC-10250484-9999.pdf

19. Frequently asked questions

What does Tesla CP_a102 mean?

It means the Wall Connector detected a high temperature at its building connection. Charging is slowed to protect the wiring and Wall Connector.

Is CP_a102 usually a vehicle problem?

Tesla’s supplied official information states that it is not typically an issue with the vehicle.

Who should inspect CP_a102?

Tesla directs the owner to contact an electrician to inspect the building wiring connection to the Wall Connector.

What should the electrician check?

The official guidance says to ensure all wires are properly connected and torqued according to the Wall Connector installation guide.

20. Sources & verification

Accepted ResearchVerified
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Tesla CP_a102: Unable to charge - Wall connection too hot Outlet or… | EV Diagnostics