The cable is connected, but the Tesla is waiting and no energy is being delivered. Before assuming a charging module has failed, check whether the station has actually authorised the session.
What CP_a066 describes
Tesla’s Model 3 manual says CP_a066 appears when the station indicates that it is not ready or charging is not authorised. A delayed schedule or a further activation step, such as an app or charging card, can account for it. The alert alone does not establish a vehicle hardware fault.
Read both sides of the session
Take a note of the car’s message and the station’s message at the same time. A receipt, a successful card check and a charging session delivering energy are different events. Explain which one occurred rather than simply saying the payment worked.
For a home installation, record any schedule set in the charger as well as the car. Do not change several settings together and then lose track of which change mattered. If a charging provider controls the schedule, its support team may need to review the account or session first.
Make a useful comparison
An existing successful session elsewhere is worth mentioning. Include its date and whether it was AC or DC charging. It does not prove every part of the vehicle is healthy, but it helps avoid treating unlike failures as the same complaint.
If another charger is used, follow its normal instructions and the car’s warnings. There is no need to make a special trip simply to reproduce a problem, especially if the vehicle has limited range or another warning that needs attention.
Who should receive the enquiry?
Contact the charging operator for an activation, payment or account issue. Do not send passwords or card details to a repair workshop. For persistent vehicle warnings or a report pointing to a car-side fault, ask AXION about EV diagnostics.
Include the Model 3 year, exact alert and session history in your repair enquiry. Those details help establish whether workshop diagnosis is the appropriate next step.