my Tesla Model S Original (2012-2020) dashboard warning lights keep coming on, what does it mean?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

503 words

Problem Statement

Learn how to diagnose and fix dashboard warning lights on Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is parked safely and not in motion during the update.
•Disconnect the high-voltage battery before working on battery components.
•Always wear safety glasses when inspecting electrical components.

Symptoms

•Multiple warning lights illuminated on the dashboard
•Possible messages displayed on the touchscreen
•Reduced vehicle performance or responsiveness
•Inconsistent charging behavior
•Alerts related to battery management or drive systems

Diagnostic Steps

1
Use an OBD-II scanner to retrieve any stored error codes from the vehicle’s computer system.
2
Check the battery state of charge and health using the Tesla app or dashboard display.
3
Inspect the vehicle’s software version and ensure it is up to date.
4
Review the vehicle's maintenance history for any recent repairs or issues.
5
Perform a visual inspection of the battery pack for any signs of damage or corrosion.
6
Check for any software glitches by performing a soft reset of the vehicle's touchscreen.

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
•Jack
•Wrench set
•Multimeter
•Flashlight

Parts Required

•Replacement fuses (if necessary)
•Battery terminal cleaner (if corrosion is found)

Related Faults

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Diagnostic Steps

1
Use an OBD-II scanner to retrieve any stored error codes from the vehicle’s computer system.
2
Check the battery state of charge and health using the Tesla app or dashboard display.
3
Inspect the vehicle’s software version and ensure it is up to date.
4
Review the vehicle's maintenance history for any recent repairs or issues.
5
Perform a visual inspection of the battery pack for any signs of damage or corrosion.
6
Check for any software glitches by performing a soft reset of the vehicle's touchscreen.

Solution

1. Software Update

Sub-steps:
- Connect the vehicle to Wi-Fi.
- Navigate to the "Software" tab in the touchscreen.
- If an update is available, follow the prompts to install it.
Tools Required: None.
Safety Warnings: Ensure the vehicle is parked safely and not in motion during the update.

2. Clear Error Codes

Sub-steps:
- Reconnect the OBD-II scanner to the vehicle.
- Select the option to clear error codes from the system.
- Verify that the warning lights have turned off after clearing the codes.
Tools Required: OBD-II scanner.

3. Battery Inspection

Sub-steps:
- Safely lift the vehicle using a jack to access the battery compartment if necessary.
- Inspect the battery terminals for corrosion and ensure they are securely connected.
- Check for any signs of damage to the battery pack casing.
Tools Required: Jack, wrench set.
Safety Warnings: Disconnect the high-voltage battery before working on battery components.

4. Visual Inspection of Components

Sub-steps:
- Inspect fuses related to electrical systems in the fuse box.
- Check wiring harnesses and connectors for signs of wear or damage.
- Look for any fluid leaks under the vehicle that may indicate other issues.
Tools Required: Flashlight, multimeter.
Safety Warnings: Always wear safety glasses when inspecting electrical components.