Charging Equipment Not Ready (Activation or Authorization Required)
The TESLA-CP_A066 (Tesla Charge Port (CP)) EV fault code means: Charging Equipment Not Ready (Activation or Authorization Required). This is a minor severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $0 — this is almost always a station activation/authorization step, not a fault. If the vehicle also won't charge at known-good chargers, Tesla service diagnoses from there.
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Common Symptoms
- Alert on the touchscreen: "Charging equipment not ready — See equipment instructions to start charging"
- Vehicle is plugged in but charging never begins
- Typically appears at third-party public charging stations
- Driving is unaffected
Probable Causes (Ranked by Likelihood)
- The charging station requires activation or authentication before it will charge — a charging card, mobile app, or credit card payment Likely
- The charging station is actively delaying charging, e.g. a scheduled-charging feature is enabled on the station Possible
Frequently Asked Questions
What does CP_a066 mean on a Tesla?
Tesla's official meaning: charging can't begin because the station is telling the vehicle it isn't ready or charging isn't authorized — the control pilot signal says the car isn't allowed to start. Usually the station needs activation (card, app, payment) or has a scheduled-charging delay active.
How do I fix CP_a066?
Look at the charging station for its activation steps — terminal, status lights, printed instructions, or payment interface — and complete them. If that fails, try another station or a Tesla Supercharger. Per Tesla, this alert usually points to the equipment, not the car.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Check the station itself for instructions: a touchscreen terminal, LED status indicators, printed instructions, or a payment interface. Many public stations won't deliver power until you've authenticated with their card, app, or payment system.
If you can't enable charging on that station, try different equipment or a different station. Per Tesla's official guidance: if the vehicle then charges, the issue was the equipment; if not, the issue may be with the vehicle.
A Tesla Supercharger or Destination Charger (findable on the touchscreen map) is a good known-good test since no external activation step is involved.
Per Tesla, this alert is usually specific to the external equipment and does not typically indicate a vehicle issue that service can resolve.
Sources 4
This page is built from documented references. Verify against your own service info before repair work.
- Tesla Model 3 Owner's ManualTroubleshooting Alerts (official Tesla alert text for CP_a066)
- Tesla Model Y Owner's ManualTroubleshooting Alerts (confirms CP_a066 is documented across models)
- Tesla firmware alert reference (core-hacked/tesla-alerts-dictionary): cp_a066community-maintained dictionary, not an official manufacturer document
- Tessie Tesla alert statisticsthird-party Tesla alert reference with owner-telemetry frequency — not an official Tesla document
Commonly Affected Vehicles
- Tesla Model 3
- Tesla Model Y
- Tesla Model S
- Tesla Model X
- Tesla Cybertruck
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