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My 2021 Model Y is charging super slow at home, sometimes stops completely

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Sarah K. · rep 0 · May 22, 5:25 AM · 1 replies · solved · Question

Vehicle: 2021 Tesla Model Y Long Range

Hey everyone,

I'm having a really frustrating issue with my 2021 Tesla Model Y Long Range. For the past week or so, when I plug it in at home using my Wall Connector, it charges incredibly slowly. Sometimes it even stops charging entirely after an hour or two, and I wake up to a partially charged battery.

I've tried unplugging and replugging, and even did a soft reset of the car, but the problem keeps coming back. My Wall Connector has been working perfectly for over two years, and I haven't changed anything with my home electrical setup. The Tesla app just shows 'Charging Interrupted' sometimes, or just a very low charging rate.

Has anyone else experienced this with their Model Y? Any ideas on what could be causing this or what I should check before calling Tesla service? I'm in the US, if that makes a difference.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:25 AM

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ClearTheCode admin answer:

Experiencing slow or intermittent charging with your 2021 Tesla Model Y can be frustrating, especially when relying on home charging. Here's a breakdown of potential causes and troubleshooting steps:

  1. Check Your Home Electrical System:

    • Dedicated Circuit: Ensure your Wall Connector is on a dedicated circuit with the correct amperage breaker. Overloaded circuits can trip or reduce power.
    • Breaker Status: Verify the circuit breaker for your charging outlet hasn't tripped or isn't faulty. Sometimes a breaker can be "weak" and trip under load.
    • Wiring Integrity: If you've recently had electrical work or if the outlet feels loose, there might be an issue with the wiring itself. Consider having an electrician check your home's charging circuit.

  2. Isolate the Charging Equipment:

    • Try a Different Charger: If possible, try charging at a different Level 2 location (e.g., a friend's house, public charger) or with a different Mobile Connector if you have access to one. This helps determine if the issue is with your specific home setup or the vehicle/charger.
    • Inspect Connectors: Visually inspect both the vehicle's charging port and your Wall Connector's cable and plug for any signs of damage, debris, or corrosion. A dirty or damaged connection can impede charging.

  3. Vehicle-Side Troubleshooting:

    • Soft Reset: Perform a soft reset of your Model Y by holding down both scroll wheels on the steering wheel until the touchscreen restarts. This can resolve minor software glitches affecting charging.
    • Check Tesla App/Vehicle Screen: Look for any specific error messages related to charging on your Tesla's touchscreen or in the Tesla mobile app. These messages often provide clues (e.g., "Charging equipment fault," "Low power detected").
    • Charging Schedule: Double-check that no charging schedules or current limits are inadvertently set in your vehicle's charging settings that might be restricting power.

Potential Causes:

  • Home Electrical Issues: As mentioned, faulty wiring, a weak breaker, or an overloaded circuit.
  • Charging Equipment Failure: The Wall Connector itself could be malfunctioning.
  • Vehicle Onboard Charger (OBC) or Charging Port Issue: Less common, but the vehicle's internal charging components or the charging port itself could have a fault.
  • Software Glitch: A temporary bug in the vehicle's firmware.

When to See a Shop: If you've gone through these steps and the problem persists, or if you receive persistent error messages like "Charging System Fault" or "Unable to Charge," it's time to schedule a service appointment with Tesla. They have specialized diagnostic tools to read internal fault codes (which are not standard OBD-II codes for charging systems) that can pinpoint issues with the onboard charger, battery management system, or charging port. Providing them with details of your troubleshooting steps will help expedite the diagnosis.

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