my Tesla Model S Original (2012-2020) has a loss of power when accelerating, what should I check?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

494 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 loss of power when accelerating 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 12V battery before working on electrical systems.
•Allow the vehicle to cool down before inspecting the drive unit or battery pack.

Symptoms

•Loss of power during acceleration
•Reduced performance or sluggish response
•Occasional warning messages on the display
•Decreased range or battery efficiency
•Unusual noises from the electric motor or drivetrain

Diagnostic Steps

1
Check the vehicle's battery state of charge and health using the Tesla app or onboard diagnostics.
2
Inspect for any error messages or alerts on the touchscreen interface.
3
Perform a visual inspection of the battery pack for any signs of damage or leakage.
4
Use the Tesla diagnostic tools to check for fault codes related to the motor or battery management system.
5
Test the acceleration performance in different driving modes (e.g., Normal, Sport).
6
Inspect the drive unit for any signs of overheating or abnormal wear.

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

•Torque wrench
•Electrical contact cleaner
•OBD-II scanner (for Tesla-specific diagnostics)

Parts Required

•Battery terminal connectors (if corroded)
•12V battery (if replacement is needed)

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 and health using the Tesla app or onboard diagnostics.
2
Inspect for any error messages or alerts on the touchscreen interface.
3
Perform a visual inspection of the battery pack for any signs of damage or leakage.
4
Use the Tesla diagnostic tools to check for fault codes related to the motor or battery management system.
5
Test the acceleration performance in different driving modes (e.g., Normal, Sport).
6
Inspect the drive unit for any signs of overheating or abnormal wear.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface and turned off.
Gather necessary tools and parts.
Disconnect the 12V battery for safety before performing any electrical work.

2. Battery Inspection

Remove the rear underbody panel to access the battery.
Inspect the battery terminals for corrosion or loose connections.
Check the battery pack for any physical damage or swelling.

3. Software Update

Connect the vehicle to Wi-Fi.
Go to the settings menu on the touchscreen and check for any available software updates.
Follow the instructions to install updates if available.

4. Drive Unit Inspection

Inspect the drive unit for any visible damage or leaks.
Check the motor and inverter connections for tightness and corrosion.
If needed, clean electrical connectors with electrical contact cleaner.

5. System Reset

After performing inspections, reconnect the 12V battery.
Perform a soft reset of the vehicle by holding down both scroll buttons on the steering wheel until the touchscreen reboots.

6. Test Drive

Take the vehicle for a test drive to verify the power loss issue has been resolved.
Monitor for any warning messages post-test drive.