Charging Equipment Not Recognized
The TESLA-CP_A004 (Tesla Charge Port (CP)) EV fault code means: Charging Equipment Not Recognized. This is a minor severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $0 in the common case (different equipment or clearing an obstruction); a vehicle-side charge port issue, if confirmed across known-good chargers, is diagnosed and quoted by Tesla service.
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Common Symptoms
- Alert on the touchscreen: "Charging equipment not recognized — Try again or try different equipment"
- Vehicle doesn't react to a plugged-in charge cable, or can't tell what type of cable is connected
- May appear even with no cable connected
- Driving is unaffected
Probable Causes (Ranked by Likelihood)
- The charge port can't detect whether a charge cable is inserted, or what type of cable is connected — per Tesla, usually caused by the external charging equipment rather than the vehicle Likely
- Debris, moisture, or a foreign object in the charge port inlet or on the cable connector Possible
- A vehicle-side charge port issue (only if the alert persists across different known-good equipment) Unlikely
Frequently Asked Questions
What does CP_a004 mean on a Tesla?
Tesla's official meaning: the charge port is unable to detect whether a charge cable is inserted, or the type of charge cable connected. It's usually the external charging equipment, not the vehicle.
How do I fix CP_a004?
Try different charging equipment first — if the car charges, the original equipment was the problem. Otherwise inspect the charge port and cable connector for debris or moisture, clear and dry them, and re-insert. If it persists across known-good chargers, have Tesla service check the charge port.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Try different external charging equipment (different cable, station, or stall). Per Tesla's official guidance: if the vehicle then charges, the issue was the equipment; if not, the issue may be with the vehicle.
If the alert appears with no cable connected — or the vehicle is suspected — inspect the charge port inlet and cable connector for debris, moisture, or foreign objects; clear any obstruction, let moisture dry, and re-insert the cable.
A Tesla Supercharger or Destination Charger (on the touchscreen map) is a good known-good test.
Per Tesla, this alert is usually specific to the external equipment and doesn't typically indicate a vehicle issue 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_a004; verified against the official Model 3 manual PDF, software 2026.20)
- Tesla Model Y Owner's ManualTroubleshooting Alerts (confirms CP_a004 is documented across models)
- Tesla firmware alert reference (core-hacked/tesla-alerts-dictionary): cp_a004community-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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