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Is there a known issue with the fuel system in the 2021 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/Is there a known issue with the fuel system in the 2021 Toyota Highlander?

Is there a known issue with the fuel system in the 2021 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Error Code: P0087
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ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
725 words

Problem Statement

Learn about the known fuel system issues in the 2021 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Error Code
P0087
Affected Component
fuel system
Estimated Time
2-4 hours

Symptoms

  • •Engine Won't Start
  • •Engine Stalling
  • •Reduced Engine Performance
  • •Check Engine Light
  • •Unusual Engine Noise

Diagnostic Steps

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

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
  • •Fuel Pressure Gauge
  • •Multimeter
  • •Basic Hand Tools
  • •Safety Glasses and Gloves
  • •Fuel Line Disconnect Tool

Additional Information

Error Code
P0087
Affected Component
fuel system
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
6 items

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Known Fuel System Issues in the 2021 Toyota Highlander

The 2021 Toyota Highlander has had some reports of fuel system-related issues, although they are not widespread. One of the notable problems involves fuel pump failures, which can lead to performance issues such as engine stalling or difficulty starting the vehicle. Below is a detailed guide to diagnose and address potential fuel system issues.

Tools Required
  • OBD-II Scanner
  • Fuel Pressure Gauge
  • Multimeter
  • Basic Hand Tools (screwdrivers, socket set)
  • Safety Glasses and Gloves
  • Fuel Line Disconnect Tool (if needed)
Repair Instructions

Step 1: Fuel Pump Replacement

  1. Safety First:

    • Disconnect the negative battery terminal to prevent any electrical issues.
    • Relieve fuel system pressure by removing the fuel pump relay and starting the engine until it stalls.

  2. Access the Fuel Pump:

    • Remove the rear seat or access panel in the trunk to reach the fuel pump assembly.
    • Disconnect the electrical connector and fuel lines from the pump.

  3. Remove the Fuel Pump Assembly:

    • Unfasten the retaining ring and carefully lift the pump assembly out of the tank.

  4. Install the New Fuel Pump:

    • Replace the old pump with a new one, ensuring that all O-rings and seals are replaced as well.
    • Reinstall the fuel pump assembly, securing it with the retaining ring.

  5. Reconnect Fuel Lines and Electrical Connector:

    • Reconnect the fuel lines and electrical harness securely.

Step 2: Fuel Filter Replacement (if applicable)

  1. Locate the Fuel Filter:

    • If your Highlander has a replaceable fuel filter (check the service manual), locate it along the fuel line.

  2. Remove Old Filter:

    • Use the fuel line disconnect tool to detach the fuel lines from the filter.
    • Remove the mounting brackets and take out the old filter.

  3. Install New Filter:

    • Install the new filter in the same orientation as the old one.
    • Reattach the fuel lines and ensure they are securely fastened.

Step 3: Clearing Codes and Testing

  1. Reconnect the Battery:

    • Reconnect the negative battery terminal.

  2. Clear DTCs:

    • Use the OBD-II scanner to erase any fault codes stored in the ECU.

  3. Test Drive:

    • Start the vehicle and take it for a test drive to ensure that the issue has been resolved. Pay attention to acceleration, starting, and any warning lights.
Conclusion

If after performing these diagnostics and repairs the problem persists, further investigation of the fuel injectors, fuel rail, or engine control module may be necessary. If you’re not comfortable performing these tasks, seeking professional assistance from a certified Toyota technician is recommended.