why does my Tesla Model S Original (2012-2020) have a rough start in the morning

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

486 words

Problem Statement

Learn how to diagnose and fix rough start issues in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle from the charging station before performing any repairs or inspections.

Symptoms

•Rough or jerky acceleration during initial drive
•Increased noise from the drive unit during startup
•Reduced power output until warmed up
•Long duration for the vehicle to reach optimal performance
•Dashboard alerts or notifications related to battery performance

Diagnostic Steps

1
Check for any software updates available via the Tesla interface.
2
Inspect the battery pack for any signs of damage or wear.
3
Use the Tesla diagnostic tool to check for any error codes.
4
Monitor battery temperature to ensure it is within normal operating range.
5
Evaluate the state of charge of the battery to ensure it is sufficient for operation.

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 diagnostic tool
•Torque wrench
•Multimeter

Parts Required

•Battery pack (if replacement is necessary)
•Drive unit components (if repair is needed)

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Diagnostic Steps

1
Check for any software updates available via the Tesla interface.
2
Inspect the battery pack for any signs of damage or wear.
3
Use the Tesla diagnostic tool to check for any error codes.
4
Monitor battery temperature to ensure it is within normal operating range.
5
Evaluate the state of charge of the battery to ensure it is sufficient for operation.

Solution

1. Preparation

Tools Required: Tesla diagnostic tool, torque wrench, multimeter
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Allow the vehicle to cool down if it has been driven recently.

2. Update Software

Connect the vehicle to Wi-Fi.
Navigate to 'Software' on the touchscreen and check for any pending updates.
Follow on-screen instructions to install any available updates.

3. Inspect Battery

Tools Required: Multimeter
Open the battery compartment and inspect for physical damage or corrosion.
Use a multimeter to check the battery voltage to ensure it meets manufacturer specifications (generally around 400 volts for a fully charged battery).
If voltage is low, consider charging the battery or replacing it if faulty.

4. Check Drive Unit

Inspect the drive unit for unusual wear or noise.
If noise persists, consult Tesla service for possible drive unit replacement.
Ensure that all connections to the drive unit are secure.

5. Test Battery Temperature

Use the Tesla diagnostic tool to monitor the battery temperature.
If the battery is too cold (below 0°C or 32°F), consider pre-conditioning the battery via the Tesla app before starting.