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How can I fix the problem of my 2020 Toyota Highlander’s fuel gauge not working? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How can I fix the problem of my 2020 Toyota Highlander’s fuel gauge not working?

How can I fix the problem of my 2020 Toyota Highlander’s fuel gauge not working?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-3 hours
Time
medium
Difficulty
medium
Severity
Error Code: P0460, P0461
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
657 words

Problem Statement

Learn how to diagnose and fix the fuel gauge issue in your 2020 Toyota Highlander with detailed steps and required tools.

Error Code
P0460, P0461
Affected Component
fuel level sensor
Estimated Time
2-3 hours

Symptoms

  • •The fuel gauge is stuck on empty.
  • •The fuel gauge fluctuates erratically.
  • •The fuel light remains illuminated even with fuel in the tank.
  • •The trip computer shows incorrect fuel calculations.

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

  • •OBD-II Scanner
  • •Multimeter
  • •Socket set
  • •Screwdrivers (flathead and Phillips)
  • •Pliers
  • •Safety glasses
  • •Clean rags
  • •Fuel line wrench (if necessary)
  • •Replacement fuel level sensor (if faulty)

Additional Information

Error Code
P0460, P0461
Affected Component
fuel level sensor
Estimated Time
2-3 hours
Difficulty
medium
Severity
medium
Tools Required
9 items

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Fixing the Fuel Gauge Issue in a 2020 Toyota Highlander

Tools Required
  • OBD-II Scanner
  • Multimeter
  • Socket set
  • Screwdrivers (flathead and Phillips)
  • Pliers
  • Safety glasses
  • Clean rags
  • Fuel line wrench (if necessary)
  • Replacement fuel level sensor (if faulty)
Repair Instructions
Step 1: Prepare the Vehicle
  1. Park the vehicle on a flat surface and engage the parking brake.
  2. Disconnect the negative battery terminal to prevent any electrical shorts.
Step 2: Access the Fuel Sender Unit
  1. Remove the rear seat or the access panel in the trunk to locate the fuel sender unit.
  2. If necessary, remove any screws or clips holding the access cover in place and carefully lift it off.
Step 3: Remove the Fuel Sender Unit
  1. Disconnect the electrical connector from the fuel sender unit.
  2. Use the appropriate socket to remove the retaining ring or screws that hold the fuel sender unit in place.
  3. Carefully lift the fuel sender unit out of the tank, taking care not to damage any fuel lines or connectors.
Step 4: Inspect and Test the Fuel Level Sensor
  1. Visually inspect the fuel level sensor for signs of damage or corrosion.
  2. Using the multimeter, measure the resistance across the sensor terminals.
    • Rotate the float arm and observe if the resistance changes smoothly. If it doesn't, the sensor is likely faulty and needs replacement.
Step 5: Replace the Fuel Level Sensor
  1. If the sensor is faulty, replace it with a new one.
  2. Install the new sensor in the same orientation as the old one.
  3. Secure it with the retaining ring or screws and reconnect the electrical connector.
Step 6: Reassemble and Test
  1. Replace the access cover and secure it with screws or clips.
  2. Reinstall the rear seat if it was removed.
  3. Reconnect the negative battery terminal.
  4. Start the vehicle and monitor the fuel gauge for correct operation. Fill the tank again to verify that the gauge reflects the fuel level accurately.
Step 7: Clear Codes
  1. If you had any trouble codes, use the OBD-II scanner to clear them.
  2. Drive the vehicle for a short distance and recheck for any new codes.
Conclusion

If the fuel gauge is still not functioning after replacing the fuel level sensor, further diagnostic steps may be needed, including checking the wiring harness for shorts or opens, inspecting the instrument cluster for faults, or consulting with a professional technician for advanced diagnostics.