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2020 Model 3 Slow Charging & Charging Port Light Issue

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Rachel A. · rep 0 · May 22, 5:25 AM · 1 replies · solved · Question

Vehicle: 2020 Tesla Model 3 Long Range

Hey everyone,

I've been having a persistent issue with my 2020 Tesla Model 3 Long Range. For the past few weeks, charging has become incredibly slow, both at home on my Wall Connector and at Superchargers. It feels like it's taking twice as long to get a full charge.

Adding to that, the charging port light has been acting strange. Sometimes it stays amber even when it should be green, or it doesn't light up at all when I plug in, even though charging eventually starts (slowly). I've tried using different charging cables and even a different Wall Connector at a friend's house, but the problem persists.

Has anyone experienced anything similar with their Model 3? I'm worried it might be a bigger electrical problem. Any advice before I schedule a service appointment?

✓ Accepted solution

ClearTheCode Admin

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

0

ClearTheCode admin answer:

It sounds like you're dealing with a frustrating charging issue, Sarah. Slow charging and erratic charging port light behavior on a 2020 Tesla Model 3 can stem from several electrical and electronic components.

Here are the common causes and troubleshooting steps:

  1. Software Glitch:

    • Cause: Sometimes, a minor software bug can affect charging protocols or sensor readings.
    • Action: Perform a soft reboot of your vehicle (hold both scroll wheels on the steering wheel until the screen goes black and the Tesla logo reappears). If that doesn't work, try a power cycle (from the 'Safety & Security' menu, select 'Power Off', wait a few minutes, then press the brake pedal to power back on).

  2. Charging Port Sensor/Actuator:

    • Cause: The charging port has sensors that detect when a cable is plugged in and an actuator that locks the cable. If these are faulty or obstructed, it can lead to incorrect light indications and charging issues.
    • Action: Carefully inspect the charging port for any debris, moisture, or bent pins. Use a flashlight. Do not insert anything metallic. If you see visible damage, this is a likely culprit.

  3. Onboard Charger (OBC) or Battery Management System (BMS):

    • Cause: The OBC converts AC power to DC for the battery, and the BMS monitors and controls battery charging. A fault in either of these critical components can severely impact charging speed and efficiency.
    • Diagnostics: While Tesla vehicles don't typically display standard OBD-II codes for these internal systems, a service center can read specific internal diagnostic codes related to charging performance (e.g., BMS_a001_Charging_Fault, OBC_b002_Input_Power_Error).

  4. Charging Cable/Wall Connector Issue (Less Likely if Tested):

    • Cause: Although you've tested different cables and Wall Connectors, it's always good to re-verify. A degraded cable or a Wall Connector with an internal fault could still contribute.
    • Action: Ensure the Wall Connector's circuit breaker is not tripped and that its indicator lights are normal.

When to See a Shop: Given that you've already tried different charging setups and the problem persists, it's highly recommended to schedule a service appointment with Tesla. This issue points towards an internal vehicle component failure, likely within the charging port assembly, onboard charger, or battery management system. Continuing to charge with a potential fault could lead to further issues or inefficient charging. Tesla service can run advanced diagnostics to pinpoint the exact component causing the problem.

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