my Tesla Model S Plaid/Refresh (2021-present) has a warning light for the coolant, how to fix

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

558 words

Problem Statement

Learn how to diagnose and fix the coolant warning light issue in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Cooling System

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always allow the vehicle to cool down before opening the coolant reservoir to avoid burns from hot coolant.

Symptoms

•Coolant warning light illuminated on the dashboard
•Possible abnormal engine temperature readings
•Decreased performance or power delivery
•Unusual noises from the cooling system (e.g., gurgling)
•Potential coolant leak visible under the vehicle

Diagnostic Steps

1
Check the coolant level in the reservoir through the Tesla app or on the vehicle's display.
2
Inspect the coolant reservoir visually for any signs of cracks or leaks.
3
Verify the coolant temperature sensor readings using the Tesla service mode.
4
Examine the coolant pump operation through the vehicle diagnostics.
5
Check for any error codes related to the coolant system using a Tesla diagnostic tool.

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
•Pliers
•Screwdriver set
•Coolant funnel

Parts Required

•Tesla-approved coolant
•New coolant reservoir (if cracked)
•Replacement hoses (if leaking)

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Diagnostic Steps

1
Check the coolant level in the reservoir through the Tesla app or on the vehicle's display.
2
Inspect the coolant reservoir visually for any signs of cracks or leaks.
3
Verify the coolant temperature sensor readings using the Tesla service mode.
4
Examine the coolant pump operation through the vehicle diagnostics.
5
Check for any error codes related to the coolant system using a Tesla diagnostic tool.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Allow the vehicle to cool down if it has been running.

2. Inspect Coolant Level

Open the front trunk and locate the coolant reservoir.
Remove the cap carefully to avoid any pressure release.
Check the coolant level against the minimum and maximum marks on the reservoir.
If low, top off with the appropriate Tesla-approved coolant mixture.

3. Inspect for Leaks

Look for any visible coolant leaks around the reservoir, hoses, and the engine compartment.
If leaks are found, identify the source (e.g., hose, reservoir, or pump) and proceed to replace the affected component.

4. Replace Coolant Reservoir or Hoses (if necessary)

If the coolant reservoir is cracked:
- Disconnect any electrical connectors attached to the reservoir.
- Remove the securing bolts or clips and carefully take out the reservoir.
- Replace with a new, OEM coolant reservoir.
If hoses are leaking:
- Remove the clamps using pliers.
- Cut off old hoses and install new ones, ensuring a snug fit.
- Secure with clamps.

5. Refill and Bleed the Cooling System

Refill the cooling system with the specified Tesla coolant mixture.
Start the vehicle and run it in service mode to allow the coolant pump to circulate fluid.
Monitor the coolant level and add more if necessary.
Let the vehicle reach operating temperature to check for any air pockets in the system.