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2021 Model Y 'Vehicle Limiting Performance' Warning & Power Loss

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Mike T. · rep 0 · May 24, 3:00 PM · 1 replies · solved · Question

Vehicle: 2021 Tesla Model Y Long Range

Hey everyone,

I'm experiencing a concerning issue with my 2021 Tesla Model Y Long Range. Yesterday, while driving on the highway, I suddenly got a 'Vehicle Limiting Performance' warning message on the screen. Almost immediately, I felt a significant reduction in power, like the car went into a limp mode. It was quite alarming.

I managed to pull over safely. I tried a soft reset (holding the scroll wheels), and the warning cleared for a bit, but it came back after about 10 minutes of driving, along with the power limitation. There wasn't any specific OBD-II code I could pull with my generic scanner, probably because Tesla uses its own diagnostics.

Has anyone else with a 2021 Model Y, or any recent Tesla model, encountered this? What was the cause, and how was it resolved? I'm worried about driving it, especially with the power reduction.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 24, 3:00 PM

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ClearTheCode admin answer: The 'Vehicle Limiting Performance' warning on your 2021 Tesla Model Y is a critical alert that indicates the vehicle's onboard systems have detected an issue severe enough to restrict power output and potentially prevent further damage. While Teslas primarily use proprietary diagnostic systems rather than standard OBD-II codes for most critical drivetrain and battery components, this warning always warrants immediate attention.

Common causes for this type of warning include:

  • High Voltage (HV) Battery System Faults: Issues with battery cells, contactors, or the Battery Management System (BMS) can trigger this.
  • Drive Unit Malfunctions: Problems with the electric motors, inverters, or associated sensors can lead to power limitation.
  • Thermal Management System Issues: Overheating of the battery or drive units can cause the vehicle to reduce power to protect components.
  • Low 12V Battery Voltage: A failing 12V auxiliary battery can cause a cascade of electrical errors, leading to various warnings.
  • Sensor Failures: Malfunctioning sensors related to power delivery or safety systems.

Here are the steps you should take:

  1. Safety First: If the warning is active and power is significantly limited, pull over to a safe location as soon as possible.
  2. Check Tesla App/Screen: Look for more specific error messages or codes on your vehicle's touchscreen or in the Tesla mobile app. Tesla often provides detailed descriptions or specific internal codes (e.g., 'BMS_u018', 'VCFRONT_a063') that can help pinpoint the issue.
  3. Attempt a Soft Reset: As you did, a soft reset (holding both scroll wheels until the screen reboots) can sometimes clear transient software glitches. If the warning returns quickly, it's likely a hardware-related issue.
  4. Monitor Symptoms: Note if the warning is consistent, if charging is affected, or if any unusual noises or smells are present.

When to see a shop: Any persistent 'Vehicle Limiting Performance' warning, especially when accompanied by noticeable power loss or safety concerns, requires immediate attention from a Tesla Service Center. Do not delay scheduling service through your Tesla app. Continuing to drive with this warning could exacerbate the underlying issue or lead to a complete breakdown. Because of the proprietary nature of Tesla's systems, only a certified Tesla technician with their specialized diagnostic tools can accurately diagnose and repair the problem.

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