my Tesla Model S Original (2012-2020) battery dies overnight what can I do

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

539 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 diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle from any power source before starting work on the battery.
•Use proper lifting equipment to avoid injury when handling the battery pack.

Symptoms

•Battery drains from full charge to empty overnight
•Battery Management System warning on the display
•Inability to start the vehicle
•Unresponsive touchscreen interface
•Increased energy consumption readings in the app

Diagnostic Steps

1
Check for any active or stored error codes using the Tesla service menu.
2
Review the energy consumption data through the vehicle's energy app for unusual patterns.
3
Inspect for any aftermarket devices or accessories that may be drawing power.
4
Verify the status of the battery management system (BMS) and its software version.
5
Conduct a visual inspection of the battery pack for signs of damage or corrosion.
6
Test the battery voltage with a multimeter to ensure it's within normal operating range.

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

•OBD-II scanner
•Multimeter
•Basic hand tools
•Torque wrench
•Socket set
•Battery lifting equipment

Parts Required

•Replacement battery

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check for any active or stored error codes using the Tesla service menu.
2
Review the energy consumption data through the vehicle's energy app for unusual patterns.
3
Inspect for any aftermarket devices or accessories that may be drawing power.
4
Verify the status of the battery management system (BMS) and its software version.
5
Conduct a visual inspection of the battery pack for signs of damage or corrosion.
6
Test the battery voltage with a multimeter to ensure it's within normal operating range.

Solution

1. Preparation

Gather necessary tools: OBD-II scanner (if applicable), multimeter, basic hand tools.
Ensure the vehicle is parked in a safe location and the key fob is not active to prevent accidental activation.

2. Update Software

Connect the vehicle to Wi-Fi.
Go to the "Software" tab on the touchscreen.
Check for and install any available updates.

3. Inspect Battery Health

Use the Tesla app or touchscreen to check battery health.
If the health is below acceptable levels (typically below 70%), consider replacement.

4. Check and Disconnect Parasitic Loads

Identify any aftermarket electronic devices (dash cams, chargers) connected to the vehicle.
Disconnect these devices.
Monitor the battery drain for another night to see if the issue persists.

5. Battery Replacement (if necessary)

If the battery is confirmed to be faulty, proceed with replacement:
- Tools Required: Torque wrench, socket set, battery lifting equipment.
- Sub-steps:
  1. Disconnect the vehicle from the charger and ensure it is powered off.
  2. Lift the vehicle using a jack and secure with jack stands.
  3. Remove the underbody panels to access the battery pack.
  4. Disconnect the battery terminals (negative first, then positive).
  5. Unbolt the battery pack from the vehicle.
  6. Install the new battery and secure it in place.
  7. Reconnect the battery terminals (positive first, then negative).
  8. Reinstall the underbody panels and lower the vehicle.