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Why does my 2020 Toyota Highlander have a strong gasoline smell? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/Why does my 2020 Toyota Highlander have a strong gasoline smell?

Why does my 2020 Toyota Highlander have a strong gasoline smell?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
610 words

Problem Statement

Learn how to diagnose and repair a strong gasoline smell in your 2020 Toyota Highlander with step-by-step instructions and required tools.

Affected Component
fuel system

Symptoms

  • •Noticeable gasoline odor inside or around the vehicle.
  • •Possible fuel leakage under the vehicle.
  • •Check Engine Light (CEL) may be illuminated.

Diagnostic Steps

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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

  • •Flashlight
  • •Safety goggles
  • •Gloves
  • •Diagnostic tools
  • •Fuel pressure gauge
  • •Wrench set
  • •Screwdrivers
  • •Socket set
  • •Torque wrench
  • •Jack and jack stands
  • •Replacement fuel line
  • •Replacement fuel injectors
  • •Replacement fuel tank
  • •Replacement EVAP canister

Additional Information

Affected Component
fuel system
Difficulty
medium
Severity
medium
Tools Required
14 items

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Back to Generation
Problem: Strong Gasoline Smell in 2020 Toyota Highlander

Symptoms:

  • Noticeable gasoline odor inside or around the vehicle.
  • Possible fuel leakage under the vehicle.
  • Check Engine Light (CEL) may be illuminated.
Repair Instructions

If a Leak is Found:

  1. Fuel Line Replacement:

    • Tools Required:
      • Wrench set
      • Screwdrivers
      • Replacement fuel line
    • Disconnect the battery.
    • Relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
    • Replace the damaged fuel line with a new one. Tighten the fittings securely.
    • Reconnect the battery.

  2. Fuel Injector Replacement:

    • Tools Required:
      • Socket set
      • Torque wrench
      • Replacement fuel injectors
    • Disconnect the injector harness and remove the fuel rail.
    • Replace any faulty injectors with new ones. Reinstall the fuel rail and reconnect the harness.

  3. Fuel Tank Repair/Replacement:

    • Tools Required:
      • Jack and jack stands
      • Wrench set
      • Replacement fuel tank (if necessary)
    • Support the vehicle and safely remove the fuel tank.
    • Inspect and repair (or replace) the tank if any leaks are found.
    • Reinstall the tank, ensuring all connections are secure.

If the EVAP System is Faulty:

  1. EVAP Canister Replacement:

    • Tools Required:
      • Socket set
      • Replacement EVAP canister
    • Disconnect the battery.
    • Remove the old EVAP canister from its mounting location.
    • Install the new canister and reconnect all hoses and electrical connectors.

  2. Fuel Cap Replacement:

    • Simply replace the fuel cap with a new OEM or compatible cap.
Final Steps

  1. Clear Codes:

    • Use a scan tool to clear any DTCs related to the fuel system or EVAP system.

  2. Test Drive:

    • Take the vehicle for a short drive and check for any gasoline smell. Monitor for any warning lights on the dashboard.

  3. Final Inspection:

    • After the test drive, perform a final inspection under the vehicle and in the engine bay to ensure no leaks are present.
Conclusion

If the gasoline smell persists after following these diagnostic steps and repairs, it’s advisable to consult a professional automotive technician to further investigate potential issues within the fuel system or other related components.