my Tesla Model S Original (2012-2020) feels like it’s losing power while driving

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

507 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 power loss issues in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure vehicle is powered off when working on electrical components.
•Allow battery components to cool down before handling.
•Always disconnect the battery before working on electrical components.
•Work in a well-ventilated area to avoid exposure to battery gases.

Symptoms

•Loss of acceleration or power during driving
•Warning messages on the dashboard (e.g., reduced power mode)
•Increased regenerative braking force without input
•Unusual sounds from the electric motors
•Decreased driving range on a full charge

Diagnostic Steps

1
Check the vehicle's battery state of charge using the touchscreen interface.
2
Scan for error codes using a compatible OBD-II scanner or Tesla Diagnostic Tool.
3
Inspect the battery pack for any visible damage or swelling.
4
Monitor battery temperature readings to check for overheating.
5
Review log data for any recorded anomalies during vehicle operation.
6
Check the condition of the drive unit and any related electrical connections.

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 or Tesla Diagnostic Tool
•Socket set
•Torque wrench
•Screwdriver set

Parts Required

•Replacement battery connectors (if damaged)
•Electrical grease for connections (if necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the vehicle's battery state of charge using the touchscreen interface.
2
Scan for error codes using a compatible OBD-II scanner or Tesla Diagnostic Tool.
3
Inspect the battery pack for any visible damage or swelling.
4
Monitor battery temperature readings to check for overheating.
5
Review log data for any recorded anomalies during vehicle operation.
6
Check the condition of the drive unit and any related electrical connections.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface and turned off.
Disconnect the 12V battery to ensure safety while working on electrical components.
Gather necessary tools and parts.

2. Inspect Battery Pack

Sub-steps:
- Remove the protective cover from the battery pack.
- Visually inspect for any signs of damage, corrosion, or swelling.
- Check battery connections for tightness and cleanliness.
Tools Required:
- Socket set
- Torque wrench

3. Check Drive Unit Connections

Sub-steps:
- Access the drive unit by removing necessary underbody panels.
- Inspect the electrical connectors for damage or corrosion.
- Re-seat any loose connections and tighten as needed.
Tools Required:
- Screwdriver set
- Torque wrench

4. Reset Battery Management System

Sub-steps:
- Reconnect the 12V battery.
- Use the touchscreen to perform a battery reset (navigate to settings and select "Reset Battery Management System").
Tools Required:
- None specifically, just the vehicle interface.

5. Reassemble and Test

Sub-steps:
- Reattach any panels removed during inspection.
- Ensure all tools and debris are cleared from the workspace.
- Perform a test drive to assess power delivery and performance.
Safety Warnings:
- Ensure vehicle is powered off when working on electrical components.
- Allow battery components to cool down before handling.