why is my Tesla Model S Original (2012-2020) losing coolant

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

513 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 (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Cooling System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the engine to cool completely before starting any work on the cooling system.
•Always wear safety glasses and gloves when handling coolant.

Symptoms

•Warning message on the display regarding low coolant level
•Overheating of the battery or motor
•Fluid puddles under the vehicle
•Decreased heating functionality in the cabin
•Frequent need to refill coolant reservoir

Diagnostic Steps

1
Inspect the coolant reservoir for cracks or leaks.
2
Check the connections and hoses for signs of wear or damage.
3
Use a pressure tester on the cooling system to identify leaks.
4
Inspect the undercarriage for signs of coolant leakage.
5
Scan the vehicle's system for any fault codes related to the coolant system.
6
Check the integrity of the radiator and water pump.

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
•Pliers
•Coolant pressure tester
•Funnel
•Coolant catch pan

Parts Required

•New coolant hoses (if damaged)
•New coolant reservoir (if damaged)
•Coolant (Tesla-approved type)

Related Faults

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Diagnostic Steps

1
Inspect the coolant reservoir for cracks or leaks.
2
Check the connections and hoses for signs of wear or damage.
3
Use a pressure tester on the cooling system to identify leaks.
4
Inspect the undercarriage for signs of coolant leakage.
5
Scan the vehicle's system for any fault codes related to the coolant system.
6
Check the integrity of the radiator and water pump.

Solution

1. Preparation

Gather tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the battery to prevent electrical issues.

2. Inspect and Replace Hoses

Tools Required: Socket set, pliers, coolant catch pan.
Sub-steps:
1. Locate the coolant hoses connected to the reservoir and the radiator.
2. Use pliers to remove hose clamps and disconnect hoses.
3. Inspect hoses for cracks, swelling, or signs of leakage.
4. Replace any damaged hoses with new ones.
5. Reconnect hoses and secure with hose clamps.

3. Replace Coolant Reservoir

Tools Required: Socket set, coolant catch pan.
Sub-steps:
1. Remove any retaining screws or bolts securing the coolant reservoir.
2. Lift the reservoir out and disconnect any electrical connectors.
3. Install the new coolant reservoir in the reverse order.
4. Reconnect any electrical connectors and secure with bolts.

4. Pressure Test and Refill Coolant

Tools Required: Coolant pressure tester, funnel.
Sub-steps:
1. Attach the coolant pressure tester to the reservoir.
2. Pump the tester to the specified pressure and inspect for leaks.
3. If no leaks are found, remove the tester and refill the system with the appropriate coolant type as per Tesla specifications.
4. Bleed the system to remove any air pockets.