why is my Tesla Model S Plaid/Refresh (2021-present) losing coolant?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

582 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 coolant loss in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Cooling System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always allow the engine to cool before working on the cooling system.
•Disconnect the high-voltage battery if working on electrical components.

Symptoms

•Coolant warning message displayed on the dashboard
•Low coolant level in the reservoir
•Overheating of the battery or motor
•Unusual sweet smell around the vehicle
•Visible coolant puddles under the vehicle
•Reduced performance or power limitations during operation

Diagnostic Steps

1
Inspect the coolant reservoir for cracks or leaks.
2
Check the coolant level and top off if necessary to see if it continues to drop.
3
Visually inspect hoses and connections for signs of wear or leakage.
4
Use a pressure tester to pressurize the cooling system and check for leaks.
5
Scan the vehicle using Tesla's diagnostic tool for any error codes related to the cooling system.
6
Inspect the radiator and its fittings for any signs of damage or corrosion.

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

•Socket set
•Hose clamps
•Screwdriver
•Pressure tester
•Funnel

Parts Required

•Coolant reservoir (if damaged)
•Replacement hoses (if necessary)
•Radiator (if damaged)

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Diagnostic Steps

1
Inspect the coolant reservoir for cracks or leaks.
2
Check the coolant level and top off if necessary to see if it continues to drop.
3
Visually inspect hoses and connections for signs of wear or leakage.
4
Use a pressure tester to pressurize the cooling system and check for leaks.
5
Scan the vehicle using Tesla's diagnostic tool for any error codes related to the cooling system.
6
Inspect the radiator and its fittings for any signs of damage or corrosion.

Solution

1. Preparation

Gather tools and parts before beginning the repair.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the high-voltage battery (if necessary) for safety.

2. Inspect and Repair Hoses

Tools Required: Socket set, hose clamps, screwdriver.
Check each hose for cracks or leaks; replace any damaged hoses.
- Use a socket set to remove the clamps and hoses.
- Install new hoses and secure with clamps, ensuring a tight fit.

3. Replace Coolant Reservoir (if damaged)

Tools Required: Socket set, new coolant reservoir.
If the reservoir is cracked, remove it:
- Disconnect any electrical connectors attached to the reservoir.
- Remove the mounting bolts using a socket set.
- Install the new reservoir and reconnect any connectors.

4. Repair or Replace Radiator

Tools Required: Socket set, radiator repair kit or new radiator.
Inspect the radiator for leaks and damage.
- If damage is found, remove the radiator:
  - Disconnect the hoses and the mounting bolts.
  - Replace with a new radiator, ensuring proper hose connections.

5. Refill Coolant

Tools Required: Funnel, coolant (Tesla-approved type).
Refill the cooling system with the appropriate coolant.
- Use a funnel to avoid spills.
- Follow the manufacturer's recommended coolant type and mix ratio.

6. Bleed the Cooling System

Tools Required: None.
Start the vehicle and let it run with the heater on to circulate the coolant.
Keep an eye on the temperature gauge and refill coolant as necessary until no air bubbles are observed.