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why does my Toyota Highlander Third Generation (2014-2019) check engine light come on after filling... - Toyota Highlander
Home/Cars/Toyota/Highlander/Third Generation (2014-2019)/why does my Toyota Highlander Third Generation (2014-2019) check engine light come on after filling...

why does my Toyota Highlander Third Generation (2014-2019) check engine light come on after filling...

Toyota Highlander Third Generation (2014-2019)

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

Problem Statement

Learn why the check engine light comes on after refueling your Toyota Highlander (2014-2019) and how to diagnose and fix the issue with our step-by-step guide.

Affected Component
Fuel System
Estimated Time
1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect the battery before working on electrical systems.
  • •Allow the engine to cool before opening any components related to the fuel system.

Symptoms

  • •Check engine light illuminated
  • •Engine stalling or rough idle after refueling
  • •Difficulty starting the engine
  • •Fuel odor near the vehicle
  • •Poor fuel economy

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
  • •Torque wrench
  • •Fuel pressure gauge

Parts Required

  • •OEM gas cap (if necessary)
  • •EVAP purge valve (if necessary)
  • •Charcoal canister (if necessary)

Additional Information

Affected Component
Fuel System
Estimated Time
1-3 hours
Difficulty
medium
Severity
medium
Tools Required
5 items
Parts Required
3 items

Related Faults

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Solution
1. Preparation
  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a level surface and the engine is cool.
  • Disconnect the battery to prevent electrical short circuits.
2. Inspect and Replace Gas Cap
  • Remove the gas cap and visually inspect for cracks or wear.
  • If damaged, replace with a new OEM gas cap.
  • Ensure the new gas cap clicks securely into place.
3. Check and Repair EVAP System
  • Locate the EVAP system components (purge valve, charcoal canister).
  • Disconnect the electrical connector from the purge valve.
  • Use a multimeter to check for continuity in the purge valve. Replace if faulty.
  • Inspect the charcoal canister for cracks or blockages; replace if necessary.
4. Inspect Fuel Lines and Connections
  • Visually inspect fuel lines for signs of wear or damage.
  • Check all connections for leaks using a fuel pressure gauge.
  • Tighten or replace any damaged or loose connections.
5. Reconnect Battery and Clear Codes
  • Reconnect the battery terminal.
  • Use the OBD-II scanner to clear any stored error codes.
  • Drive the vehicle for a short distance to see if the check engine light returns.