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2018 Model 3 Long Range - Noticeable Loss of Power and Acceleration

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Christine P. · rep 0 · May 22, 5:19 AM · 1 replies · solved · Question

Vehicle: 2018 Tesla Model 3 Long Range

Hey everyone,

I've got a 2018 Tesla Model 3 Long Range, and lately, I've noticed a significant drop in its usual zip. It just doesn't accelerate with the same urgency it used to, especially off the line or when passing on the highway.

There are no warning lights on the dash, and the battery seems to be charging normally. I've tried rebooting the car a couple of times, but it hasn't made any difference. It just feels sluggish, almost like it's in a permanent 'chill' mode, even when set to 'sport'.

Has anyone else experienced this with their Model 3? Could it be a battery degradation issue, or something with the motor itself? Any insights or suggestions would be greatly appreciated before I schedule a service appointment.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:19 AM

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ClearTheCode admin answer:

Experiencing a noticeable loss of power and acceleration in your 2018 Tesla Model 3 can be concerning, especially without any clear warning lights. This issue often points to a few potential areas within the electric drivetrain that warrant investigation.

  1. Battery Health and Degradation: Over time, EV batteries naturally degrade, which can lead to reduced power output and range. While your car might still charge, its ability to deliver peak power could be diminished. Tesla's service diagnostics can provide a detailed report on your battery's state of health.
  2. Software Glitches: Although you've tried reboots, sometimes deeper software issues can affect power delivery. Ensure your vehicle's software is fully up to date. Occasionally, a re-calibration of the battery management system (BMS) might be needed, which is typically done by a service center.
  3. Drive Unit (Motor) Performance: Less commonly, issues with the electric motor itself or its inverter could be the cause. Problems like failing motor windings or inverter components can lead to reduced power. While there might not be a specific OBD-II code for this that an owner can pull, Tesla's internal diagnostics would flag such an issue.
  4. Thermal Management System: If the battery or drive unit is not being adequately cooled or heated, the car's computer will limit power output to protect components. A fault in the thermal management system could lead to this symptom.

When to See a Shop: Given that the issue persists and affects the core performance of your vehicle, it's highly recommended to schedule a service appointment with Tesla. They have proprietary diagnostic tools that can pinpoint the exact cause, whether it's a battery, motor, inverter, or software-related problem. Mention that you've already performed reboots and that there are no dashboard warnings, but the power loss is significant. They can check for internal diagnostic trouble codes (DTCs) that aren't displayed to the driver.

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