The CC_a001 error code may be triggered when charging with the Wall Connector.
What this alert means: No ground connection detected in the Wall Connector.
It manifests as a failure to charge, specifically indicating that the Wall Connector cannot verify a stable protective earth connection. To confirm this symptom, observe the unit's status light pattern and the error message provided on the vehicle's dashboard or Tesla app. Attempt a power cycle by turning off the dedicated circuit breaker for 30 seconds and turning it back on; if the error persists immediately upon reconnection, the unit is actively rejecting the ground connection.
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