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2025 ZDX EV A-Spec - Slow Charging / Charging Port Error

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Mike T. · rep 0 · May 26, 3:40 AM · 1 replies · solved · Question

Vehicle: 2025 Acura ZDX EV A-Spec

Hey everyone,

Just picked up my new 2025 Acura ZDX EV A-Spec a couple of weeks ago, and I'm already running into a frustrating issue with charging. When I plug it into my Level 2 home charger (which worked fine with my previous EV), it often charges much slower than expected, or sometimes I even get a 'Charging Port Error' message on the dash and the AcuraLink app.

I've tried using different charging cables and even a public Level 2 charger, and the problem persists intermittently. Sometimes it charges normally, other times it's super slow or errors out. I've checked the charging port for any debris, and it looks clean. It's a brand new car, so this is quite concerning.

Has anyone else with a ZDX EV experienced anything similar? Could it be a software bug, or something more serious with the charging hardware itself? Any advice before I take it back to the dealer?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:40 AM

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ClearTheCode admin answer:

It's certainly frustrating to experience charging issues with a brand new 2025 Acura ZDX EV A-Spec. Given that the problem occurs with different cables and chargers, it points towards an issue with the vehicle itself rather than your home setup. EV charging systems are complex, involving communication between the car, charger, and sometimes the grid.

Potential Causes & Diagnostics:

  1. Vehicle's Onboard Charger (OBC): The OBC converts AC power from your Level 2 charger into DC power for the battery. A fault in the OBC could lead to slow charging or communication errors.
  2. Charging Port Assembly: This includes the physical port, its internal sensors, and associated wiring. A faulty sensor within the port (e.g., for temperature or connection detection) or a wiring issue could trigger the 'Charging Port Error'.
  3. Battery Management System (BMS) Glitch: The BMS monitors and controls the battery's charging process. A software bug or fault in the BMS could incorrectly limit charging speed or report errors.
  4. Software/Firmware Issue: As a new model, there might be initial software bugs affecting charging protocols. An update could resolve this.
  5. Thermal Management System: If the battery or charging components are overheating (or the system incorrectly thinks they are), the vehicle might limit charging speed as a protective measure.
  6. OBD-II Codes: EV charging systems generate specific diagnostic trouble codes (DTCs) when faults occur. These can be related to the OBC, BMS, or charging communication. A dealership will be able to read these codes, which might include U-codes (network communication) or P-codes specific to high-voltage systems (e.g., P0D01 for charger communication error, P0D20 for onboard charger fault).

When to See a Shop:

Since this is a brand new vehicle and charging is a fundamental function, you should schedule an appointment with your Acura dealership immediately. They have the specialized diagnostic equipment and training for EV systems. Be sure to provide them with details:

  • What specific error messages you see.
  • If the issue occurs with both Level 2 AC and potentially DC fast charging (if you've tried it).
  • The specific charging speeds you observe when it's slow.
  • Any patterns (e.g., always after a certain drive, or only when the battery is at a specific state of charge).

Do not attempt to self-diagnose or repair high-voltage EV components.

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