my Tesla Model S battery drains too quickly what should I check

Solution

1. Preparation

• Tools Required: Tesla diagnostic tool, multimeter, basic hand tools (screwdrivers, wrenches)
• Disconnect the vehicle from the charger and ensure all doors and windows are closed to enable sleep mode.
• Ensure the vehicle is parked in a safe environment.

2. Inspect Battery Health

• Access the vehicle settings and navigate to the battery section.
• Run the battery health report and note any warnings or alerts.
• If the battery capacity is significantly reduced, consider replacement options.

3. Check for Parasitic Draw

• Use a multimeter to measure current draw:
  • Disconnect the negative terminal of the battery.
  • Connect the multimeter in series between the negative battery terminal and the negative battery cable.
  • Ensure the vehicle is in sleep mode and check the reading.
  • Normal parasitic draw should be under a specific milliamps threshold; anything higher indicates a problem.
• Identify and disconnect any accessories that might be causing excessive draw.

4. Address Software Issues

• Ensure that the vehicle software is up to date:
  • Go to Settings > Software and check for updates.
  • If an update is available, follow prompts to install it, which may resolve bugs affecting battery performance.

5. Consult Tesla Service

• If issues persist after performing these checks and repairs, schedule a service appointment through the Tesla mobile app or website.
• Provide detailed information about the symptoms and diagnostic results to assist technicians.