why does my Tesla Model S Original (2012-2020) battery die when parked

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

456 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 fix battery drain issues in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in a safe location while performing diagnostics and adjustments.

Symptoms

•Battery drains significantly even when the vehicle is parked
•"Battery Low" warning displayed on the dashboard
•Difficulty starting the vehicle after a period of inactivity
•Reduced range when driving after a parked period
•Increased frequency of charging required

Diagnostic Steps

1
Check the vehicle's energy consumption settings in the touchscreen display.
2
Use the Tesla app to monitor battery usage over time while parked.
3
Inspect for any software updates that may address battery management issues.
4
Run a battery health check via the Tesla service menu.
5
Examine for any aftermarket devices or accessories that may be drawing power.
6
Review vehicle logs for any abnormal energy drain notifications.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

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 app

Parts Required

•None (unless battery replacement is necessary based on diagnostics)

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Diagnostic Steps

1
Check the vehicle's energy consumption settings in the touchscreen display.
2
Use the Tesla app to monitor battery usage over time while parked.
3
Inspect for any software updates that may address battery management issues.
4
Run a battery health check via the Tesla service menu.
5
Examine for any aftermarket devices or accessories that may be drawing power.
6
Review vehicle logs for any abnormal energy drain notifications.

Solution

1. Preparation

Ensure the vehicle is parked safely and in a flat position.
Disconnect any aftermarket accessories or devices that may affect battery performance.
Make sure the vehicle’s software is up to date.

2. Battery Management System Reset

Access the vehicle's controls:
- Tap on "Controls" on the touchscreen.
Perform a soft reset:
- Hold down both scroll wheels on the steering wheel until the touchscreen reboots.
- Wait for the Tesla logo to appear before releasing the scroll wheels.

3. Energy-saving Settings Adjustment

Navigate to Energy Settings:
- On the touchscreen, go to "Settings" > "Energy."
Adjust Energy Saving Mode:
- Enable "Energy Saving" mode to minimize battery consumption while parked.
- Disable "Always Connected" if not needed, as this can drain battery when parked.

4. Battery Health Optimization

Inspect Battery Health:
- Run a diagnostic check through the Tesla app or service center to assess battery health.
Battery Maintenance:
- If necessary, contact Tesla for battery servicing or replacement based on health status.