AutoCodes – Scion – P0455 2007 Scion xB

P0455 2007 Scion xB Code - EVAP System Gross Leak Detected

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 2007 Scion xB indicates EVAP System Gross Leak Detected.
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 3,614

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 2007 Scion xB 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 2007 Scion xB - EVAP System Gross Leak Detected - AutoCodes.com — P0455 2007 Scion xB Code - EVAP System Gross Leak Detected

What does this mean?

What are the Possible Causes of the DTC P0455 2007 Scion xB?

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 2007 Scion xB?

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 tighten 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 2007 Scion xB 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 2007 Scion xB code?

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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 2007 Scion xB Code

1. What does the OBDII code P0455 mean on a 2007 Scion xB?

P0455 indicates a "Gross Leak Detected" in the EVAP (Evaporative Emission Control) system, meaning thereâ€™s a significant leak allowing fuel vapors to escape.

2. What are the common symptoms of code P0455 in a 2007 Scion xB?

Symptoms may include the check engine light turning on, a noticeable fuel smell, and, in rare cases, a minor drop in fuel efficiency.

3. What causes the P0455 code on a 2007 Scion xB?

Common causes include a loose or damaged gas cap, a cracked or disconnected EVAP hose, a faulty purge valve, or a leaking charcoal canister.

4. Can a loose gas cap trigger the P0455 code on my 2007 Scion xB?

Yes, a loose or damaged gas cap is one of the most common causes of the P0455 code and should be checked first.

5. How do I fix the P0455 code on a 2007 Scion xB?

Start by tightening or replacing the gas cap. If the code persists, inspect EVAP hoses, the purge valve, and the charcoal canister for leaks or damage.

6. Is it safe to drive a 2007 Scion xB with the P0455 code?

Yes, itâ€™s generally safe to drive with this code, but itâ€™s best to address it promptly to avoid potential environmental issues or further damage to the EVAP system.

7. How can I diagnose the P0455 code on a 2007 Scion xB?

Check the gas cap for proper fitment, visually inspect EVAP hoses for cracks or disconnections, and use a smoke machine to detect leaks if necessary.

8. How much does it cost to repair the P0455 code on a 2007 Scion xB?

Costs vary depending on the issue. A replacement gas cap might cost $10-$30, while repairs to the EVAP system could range from $100 to $600 depending on the part and labor required.

9. Can extreme weather cause the P0455 code on a 2007 Scion xB?

Yes, extreme heat or cold can sometimes cause EVAP components or hoses to crack, leading to a gross leak.

10. Will clearing the P0455 code fix the problem on my 2007 Scion xB?

Clearing the code without fixing the underlying issue will not resolve the problem, and the code is likely to return. Proper diagnosis and repair are necessary.