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why does my Tesla Model 3 Original (2017-2023) have a battery coolant warning? - Tesla Model 3
Home/Cars/Tesla/Model 3/Highland (2024-present)/why does my Tesla Model 3 Original (2017-2023) have a battery coolant warning?

why does my Tesla Model 3 Original (2017-2023) have a battery coolant warning?

Tesla Model 3 Highland (2024-present)

Error Codes
1-2 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
517 words

Problem Statement

Learn how to diagnose and fix battery coolant warning in Tesla Model 3 (2017-2023). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component
Cooling System
Estimated Time
1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Ensure the vehicle is powered off before working on any electrical components.
  • •Allow the vehicle’s system to cool down before inspecting the battery coolant system to avoid burns.

Symptoms

  • •Battery coolant warning message displayed on the screen
  • •Decreased driving range or performance
  • •Unusual noises from the battery cooling system
  • •Overheating of the battery during charging or operation
  • •Charging not reaching full capacity

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

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

  • •Coolant funnel
  • •Tesla-approved battery coolant
  • •Visual inspection tools (flashlight)
  • •Multimeter (optional for testing)

Parts Required

  • •Tesla-approved battery coolant

Additional Information

Affected Component
Cooling System
Estimated Time
1-2 hours
Difficulty
medium
Severity
medium
Tools Required
4 items
Parts Required
1 item

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Solution
1. Preparation
  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a level surface and the power is off.
  • Wear safety gloves and goggles.
2. Check and Refill Coolant
  • Tools Required: Coolant funnel, Tesla-approved battery coolant (e.g., Tesla's proprietary coolant)
  • Locate the battery coolant reservoir, typically found in the front trunk (frunk).
  • Remove the cap and check the coolant level against the minimum and maximum markers.
  • If the coolant is low, use the funnel to carefully add Tesla-approved battery coolant until it reaches the appropriate level.
3. Inspect Cooling System
  • Tools Required: Visual inspection tools (flashlight)
  • Inspect all hoses connected to the battery cooling system for signs of wear, cracks, or leaks.
  • Check connections for tightness and secure any loose clamps.
4. Test Battery Cooling Fans
  • Tools Required: Multimeter (optional for testing)
  • Turn on the vehicle and set the climate control to max cooling.
  • Listen for the battery cooling fans; they should engage. If they do not, further diagnostics on the fan relay and wiring may be necessary.
5. Reset System
  • If applicable, perform a soft reset of the vehicle by pressing and holding both scroll wheels on the steering wheel until the touchscreen reboots.
  • After rebooting, monitor the display for any reoccurrence of the battery coolant warning.