why does my Tesla Model S Plaid/Refresh (2021-present) display a battery warning?

Solution

1. Preparation

• Gather necessary tools such as a multimeter and a diagnostic scanner compatible with Tesla vehicles.
• Ensure the vehicle is parked in a safe location and the engine is off.

2. Inspect Battery Connections

• Sub-step 1: Open the frunk (front trunk) and locate the battery terminals.
• Sub-step 2: Visually inspect the terminals for corrosion or loose connections.
• Sub-step 3: If corrosion is present, clean the terminals using a mixture of baking soda and water, then dry thoroughly.
• Sub-step 4: Tighten any loose connections to ensure a secure fit.

3. Perform Software Update

• Sub-step 1: Access the vehicle’s settings on the touchscreen.
• Sub-step 2: Go to the "Software" section and check for available updates.
• Sub-step 3: Follow the prompts to install any pending updates, ensuring the vehicle is connected to Wi-Fi.

4. Run Battery Health Diagnostics

• Sub-step 1: Access the service menu through the touchscreen.
• Sub-step 2: Navigate to the "Battery" diagnostics section.
• Sub-step 3: Follow the prompts to run a full diagnostic check on the battery health.

5. Contact Tesla Support

• If issues persist, gather diagnostic data and contact Tesla support for further assistance. Provide them with any error codes or alerts received.