CP_a013
Tesla
Internal Communication Bus Error
Wall Connector will not connect to vehicle; app shows CP_a013 and Wi‑Fi setup may fail
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Firmware incompatibility, Corrupted configuration, Faulty internal communication between Wi‑Fi module and main MCU, Power supply instability on logic board
How to Fix / Troubleshooting
Safety: This is a low‑voltage electronics issue; still, turn off power before opening the unit.
- Power cycle: Turn off the breaker for 2–3 minutes, then restore power and wait for the Wall Connector to fully boot.
- Reset configuration (Gen 3): Use the commissioning Wi‑Fi access point to reset the Wall Connector to factory settings, then reconfigure breaker size and network settings.
- Check Wi‑Fi signal: Ensure the Wall Connector has a stable Wi‑Fi connection if cloud features are required, though basic charging should work offline.
- Update firmware: Allow the unit to remain powered and connected to Wi‑Fi for at least 30 minutes to receive any pending firmware updates.
- If CP_a013 persists: The internal logic board or communication module is likely defective and the Wall Connector should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Tesla Wall Connector logic board and Wi‑Fi module
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