why does my Tesla Model S Original (2012-2020) make a hissing noise when I charge it

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

559 words

Problem Statement

Learn how to diagnose and fix the hissing noise during charging in Tesla Model S (2012-2020). Step-by-step guide with symptoms and solutions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect power to the charging station before inspecting or repairing.
•Allow the vehicle to cool down before working on the battery system.

Symptoms

•Hissing noise audible while charging
•No error messages displayed on the dashboard
•Charging speed may be slower than normal
•No unusual smells or visible damage around charging port
•Occasional fluctuations in charging current

Diagnostic Steps

1
Inspect the charging cable for any visible damage or wear.
2
Verify that the charging station is functioning properly by testing it with another vehicle.
3
Check the vehicle's onboard charging settings for any limitations.
4
Monitor the charging current and voltage using a suitable app or diagnostic tool.
5
Inspect the battery thermal management system for any signs of malfunction or leaks.
6
Use an OBD-II scanner to check for any hidden error codes related to the charging system.

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
•Socket set
•Coolant recovery kit
•Flashlight

Parts Required

•Replacement charging cable (if damaged)
•Replacement coolant pump (if necessary)

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Diagnostic Steps

1
Inspect the charging cable for any visible damage or wear.
2
Verify that the charging station is functioning properly by testing it with another vehicle.
3
Check the vehicle's onboard charging settings for any limitations.
4
Monitor the charging current and voltage using a suitable app or diagnostic tool.
5
Inspect the battery thermal management system for any signs of malfunction or leaks.
6
Use an OBD-II scanner to check for any hidden error codes related to the charging system.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked in a well-ventilated area.
Disconnect the charger from the vehicle and the power source.

2. Inspect Charging Cable

Sub-steps:
1. Examine the entire length of the charging cable for cracks, fraying, or signs of wear.
2. Look closely at the connectors on both ends for dirt or damage.
3. If damage is found, replace the charging cable with a new one.
Tools Required: None, but a flashlight may help in inspection.

3. Check Charging Station

Sub-steps:
1. Connect the Tesla to a different charging station to see if the noise persists.
2. If using a home charger, ensure it is properly installed and rated for the Tesla Model S.
3. If the noise stops at a different station, consider having the original station inspected by a qualified electrician.
Tools Required: None.

4. Inspect Battery Thermal Management

Sub-steps:
1. Access the battery compartment and check for any signs of coolant leaks.
2. Inspect the coolant pump for proper operation and any unusual noise.
3. Replace the coolant pump if it shows signs of malfunction.
Tools Required: Socket set, coolant recovery kit.

5. Reconnect and Test

Sub-steps:
1. Reconnect the charging cable to the vehicle and the power source.
2. Start charging and monitor for any unusual noises or changes in behavior.
3. If the hissing noise persists, consult with Tesla service for further diagnostic testing.
Tools Required: None.