AutoCodes – Toyota – P0455 2006 Toyota Highlander

P0455 2006 Toyota Highlander Code - Evaporative Emission Control System Leak Detected Gross Leak

Quick Answer

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0455 2006 Toyota Highlander indicates Evaporative Emission Control System Leak Detected Gross Leak .
Common causes: Common causes include Missing or loose fuel cap, Incorrect fuel filler cap used, Fuel filler cap remains open or fails to close.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 7,612

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0455 2006 Toyota Highlander Description

This diagnosis detects leaks in the Evaporative Emission System (EVAP) purge line using engine intake manifold vacuum. If pressure does not increase, the Engine Control Module (ECM) will check for leaks in the line between the fuel tank and EVAP canister purge volume control solenoid valve under the following vacuum test condition.
The vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the EVAP purge line off. The EVAP canister purge volume control solenoid valve is opened to depressurize the EVAP purge line using intake manifold vacuum. After this depressurization is implemented, the EVAP canister purge volume control solenoid valve will be closed.

OBDII Code P0455 2006 Toyota Highlander - Evaporative Emission Control System Leak Detected Gross Leak - AutoCodes.com — P0455 2006 Toyota Highlander Code - Evaporative Emission Control System Leak Detected Gross Leak

What does this mean?

What are the Possible Causes of the DTC P0455 2006 Toyota Highlander?

Missing or loose fuel cap
Incorrect fuel filler cap used
Fuel filler cap remains open or fails to close
Foreign matter caught in fuel filler cap
EVAP canister or fuel tank leaks
EVAP system hose leaking
Fuel tank leaking

How to Fix the DTC P0455 2006 Toyota Highlander?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The P0455 it's a very common code because the code is set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be clear by disconnecting the car battery for about 30 minutes.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0455 2006 Toyota Highlander code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0455 2006 Toyota Highlander code?

Need more information on how to fix the P0455 2006 Toyota Highlander code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0455 2006 Toyota Highlander code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0455 2006 Toyota Highlander Code

1. What does the OBDII code P0455 mean on a 2006 Toyota Highlander?

The code P0455 indicates that the Evaporative Emission Control System has detected a gross leak, meaning a significant issue with the system's ability to contain and control fuel vapors.

2. What are common symptoms of a P0455 code in a 2006 Toyota Highlander?

Common symptoms of a P0455 code may include the check engine light illuminating, a strong fuel odor around the vehicle, and potential issues with fuel efficiency.

3. What are some possible causes of a P0455 code in a 2006 Toyota Highlander?

Potential causes of a P0455 code can include a loose or damaged gas cap, a leaking EVAP system hose, a faulty EVAP canister, or a malfunctioning purge valve.

4. How serious is a P0455 code on a 2006 Toyota Highlander?

While a P0455 code may not pose an immediate danger to driving, it can negatively impact fuel economy and emissions. It is recommended to address the issue promptly to prevent further problems.

5. Can I drive my 2006 Toyota Highlander with a P0455 code?

It is generally safe to drive your vehicle with a P0455 code in the short term, but it is advisable to have the issue diagnosed and repaired as soon as possible to avoid potential long-term issues.

6. How do I diagnose and repair a P0455 code on a 2006 Toyota Highlander?

Diagnosing a P0455 code may involve inspecting the gas cap, EVAP system hoses, canister, and purge valve for leaks or damage. Repairing the issue typically involves fixing the source of the leak and clearing the code.

7. Can a P0455 code on a 2006 Toyota Highlander be triggered by a loose gas cap?

Yes, a loose or improperly sealed gas cap is a common cause of a P0455 code. Ensure the gas cap is tightened properly and see if the code resets before pursuing further diagnosis.

8. How can I prevent a P0455 code from appearing on my 2006 Toyota Highlander?

To prevent a P0455 code, regularly check and tighten the gas cap after refueling, perform routine maintenance on the EVAP system, and address any fuel system issues promptly.

9. Will a P0455 code on a 2006 Toyota Highlander affect the vehicle's performance?

In most cases, a P0455 code will not directly impact the vehicle's performance but may lead to decreased fuel efficiency and increased emissions if left unresolved.

10. Should I reset the OBDII code after repairing a P0455 issue on my 2006 Toyota Highlander?

After repairing the underlying cause of the P0455 code, it is recommended to clear the code using an OBDII scanner to reset the system and ensure the issue has been resolved.

1. What does OBDII code P0455 on a 2006 Toyota Highlander mean?

The code P0455 indicates that the Evaporative Emission Control System has detected a gross leak.

2. What are the common symptoms of a P0455 code on a 2006 Toyota Highlander?

Common symptoms include the check engine light illuminating on the dashboard and a noticeable fuel odor around the vehicle.

3. What are the possible causes of a P0455 code on a 2006 Toyota Highlander?

Potential causes include a loose or damaged gas cap, a cracked or disconnected EVAP system hose, a faulty EVAP canister, or a malfunctioning purge or vent valve.

5. Can I continue driving my 2006 Toyota Highlander with a P0455 code?

It is generally safe to drive the vehicle with a P0455 code, but it is recommended to have it diagnosed and repaired as soon as possible to avoid further problems.

6. How can I diagnose a P0455 code on my 2006 Toyota Highlander?

Diagnosing a P0455 code typically involves inspecting the EVAP system components for visible damage, checking the gas cap for proper sealing, and using a smoke machine to detect leaks.

7. How do I repair a P0455 code on a 2006 Toyota Highlander?

Repairing a P0455 code may involve tightening or replacing the gas cap, repairing or replacing damaged hoses, replacing the EVAP canister, or addressing issues with the purge or vent valve.

8. Can a P0455 code on a 2006 Toyota Highlander be fixed by resetting the check engine light?

Simply resetting the check engine light without addressing the underlying issue causing the P0455 code will not solve the problem. It is essential to diagnose and repair the root cause of the code.

9. How much does it cost to repair a P0455 code on a 2006 Toyota Highlander?

The cost of repairing a P0455 code can vary depending on the specific issue causing the code and the labor rates of the repair shop. It is recommended to obtain a diagnosis and repair estimate from a qualified mechanic.

10. How can I prevent a P0455 code from recurring on my 2006 Toyota Highlander?

To prevent a P0455 code from reoccurring, it is crucial to ensure the gas cap is properly tightened after refueling, regularly inspect the EVAP system components for damage, and address any potential leaks promptly.