how to fix P0455 code in Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0455

3 min read

541 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0455 fuel system issue in Toyota Highlander (2014-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0455

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Avoid working on the EVAP system when the vehicle is hot to prevent burns.

Symptoms

•Check engine light illuminated
•Fuel smell near the vehicle
•Poor fuel economy
•Failure in emissions testing
•Hissing sound from the fuel tank area when refueling

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0455 and check for any related codes.
2
Inspect the gas cap for cracks, damage, or improper sealing.
3
Visually inspect EVAP hoses and lines for cracks, breaks, or loose connections.
4
Check the EVAP canister for damage or blockages.
5
Perform a smoke test to locate any leaks in the EVAP system.
6
Test the integrity of the fuel tank pressure sensor and related components.

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
•Socket set
•Smoke machine
•Wrenches

Parts Required

•New gas cap
•Replacement EVAP hoses
•New EVAP canister

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0455 and check for any related codes.
2
Inspect the gas cap for cracks, damage, or improper sealing.
3
Visually inspect EVAP hoses and lines for cracks, breaks, or loose connections.
4
Check the EVAP canister for damage or blockages.
5
Perform a smoke test to locate any leaks in the EVAP system.
6
Test the integrity of the fuel tank pressure sensor and related components.

Solution

1. Preparation

Gather tools and parts required.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to prevent any electrical shorts.

2. Inspect and Replace Gas Cap

Remove the gas cap and inspect the rubber gasket for wear.
If damaged, replace with a new OEM gas cap.
Reinstall the gas cap securely and ensure it clicks.

3. Repair or Replace EVAP Hoses

Locate the EVAP hoses connected to the canister and fuel tank.
Inspect each hose for cracks or loose fittings.
If any hose is damaged, use a socket set to disconnect and replace with new hoses.
Ensure all connections are tight and secure.

4. Inspect and Replace EVAP Canister

Locate the EVAP canister under the vehicle (usually near the fuel tank).
Remove any mounting bolts using a socket set.
Disconnect the hoses connected to the canister.
Replace the EVAP canister with a new one, ensuring correct routing of hoses and secure mounting.

5. Perform Smoke Test (if necessary)

Connect a smoke machine to the EVAP system.
Activate the smoke machine and look for smoke escaping from any leaks.
Repair any identified leaks by replacing damaged components.

6. Reconnect Battery and Clear Codes

Reconnect the battery.
Use the OBD-II scanner to clear the P0455 code.
Start the engine and allow it to reach operating temperature.