FAULTBASE
Error CodesASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Tesla/Model Y/Current (2020-present)/how to clear B0990 code on Tesla Model Y Current (2020-present)

how to clear B0990 code on Tesla Model Y Current (2020-present)

Tesla Model Y Current (2020-present)

Error Codes
Severity: highDifficulty: mediumError Code: B09901-2 hours
3 min read
509 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and clear B0990 code in Tesla Model Y. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
B0990
Component
Electrical
Repair Time
1-2 hours

Safety Warnings

  • ⚠Always disconnect the high voltage battery before performing any repairs on the battery pack.

Symptoms

  • •Check battery management system warning displayed on the dashboard
  • •Reduced vehicle performance or range
  • •Inability to charge the battery properly
  • •Intermittent alerts related to battery health
  • •Possible loss of regenerative braking functionality

Diagnostic Steps

  1. 1Scan the vehicle using a Tesla diagnostic tool to confirm the B0990 code and check for any additional related codes.
  2. 2Inspect the battery pack connections for corrosion, looseness, or damage.
  3. 3Verify the condition of the battery management system (BMS) by checking the voltage and temperature readings using a multimeter or Tesla-specific diagnostic software.
  4. 4Check for software updates for the vehicle’s operating system, as updates may resolve underlying software issues.
  5. 5Reset the vehicle's systems by performing a power cycle: turn off the vehicle completely and allow it to sleep for a few minutes.
  6. 6If the code persists, consult the Tesla service manual for specific troubleshooting related to the B0990 code.

Solution

Solution

1. Preparation

  • Ensure the vehicle is parked on a level surface and turned off.
  • Gather necessary tools including a Tesla diagnostic tool and multimeter.

2. Inspect Battery Connections

  • Tools Required: Wrench set, multimeter
  • Locate the battery pack access points.
  • Inspect all connectors for looseness, corrosion, or damage.
  • Tighten any loose connections to the manufacturer's torque specifications.
  • Clean any corrosion using a wire brush or contact cleaner.

3. Perform a BMS Reset

  • Tools Required: Tesla diagnostic tool
  • Connect the diagnostic tool to the vehicle’s OBD-II port.
  • Follow the on-screen instructions to perform a Battery Management System reset.
  • Confirm that the reset was successful and that the vehicle's systems are functioning correctly.

4. Update Software

  • Tools Required: Tesla mobile app or vehicle touchscreen
  • Navigate to the software update section of the Tesla touchscreen.
  • Check for any available updates and initiate the installation if applicable.
  • Allow the vehicle to complete the update process and restart.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • Tesla diagnostic tool
  • Multimeter
  • Wrench set

Parts Required

  • Battery connection terminals (if corrosion is severe)
  • Contact cleaner (for cleaning connections)

Additional Information

Error CodeB0990
Component

Electrical

Repair Time

1-2 hours

Difficulty

medium

Severity

high

Tools

3 items

Parts

2 items

Related Faults

  1. Are there any issues with the Tesla Model Y's adaptive headlights?

    Learn about common issues with Tesla Model Y's adaptive headlights, including symptoms, diagnostic steps, and repair instructions.

    adaptive headlights4 symptoms

  2. How do I fix a Tesla Model Y that is stuck in gear?

    Learn how to diagnose and fix a Tesla Model Y that is stuck in gear with this step-by-step guide covering symptoms, diagnostic steps, and tools required.

    Transmission / Gear Selector4 symptoms

  3. What steps should I take if my Tesla Model Y's brakes feel spongy?

    Learn how to diagnose and fix spongy brakes on your Tesla Model Y with step-by-step instructions and required tools.

    brake system4 symptoms

  4. How do I troubleshoot issues with the Tesla Model Y's audio system?

    Learn how to troubleshoot and resolve audio system issues in your Tesla Model Y with these detailed steps and diagnostic tips.

    audio system5 symptoms

  5. What are the common electrical faults reported in the Tesla Model Y 2020 to present?

    Explore common electrical faults in the Tesla Model Y, including symptoms, diagnostic steps, tools required, and repair instructions.

    Electrical System15 symptoms

  6. What should I do if my Tesla Model Y's battery management system malfunctions?

    Learn how to diagnose and repair the Battery Management System (BMS) issues in your Tesla Model Y, including symptoms, diagnostic steps, and tools required.

    Battery Management System5 symptoms

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation