AutoCodes – Toyota – P1455 2009 Toyota Prius

P1455 2009 Toyota Prius Code - Vapor Reducing Fuel Tank System Malfunction

Quick Answer

The Engine Control Module (ECM) detects leakage of evaporative emissions from the bladder membrane by using the heated oxygen sensor and pressure switching valve. Common causes include EVAP system large leak detected, Hose and pipe for EVAP system (broken or loose), Fuel system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1455 2009 Toyota Prius indicates Vapor Reducing Fuel Tank System Malfunction.
Common causes: Common causes include EVAP system large leak detected, Hose and pipe for EVAP system (broken or loose), Fuel system.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,853

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 23, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1455 2009 Toyota Prius Description

The Engine Control Module (ECM) detects leakage of evaporative emissions from the bladder membrane by using the heated oxygen sensor and pressure switching valve. By opening the purge VSV and then closing the pressure switching valve, air in the outer tank is drawn into the intake manifold. The ECM checks concentration of hydrocarbon (HC) molecules in the air drawn from the bladder membrane area. Also, the ECM checks the sensor output before and after closing the pressure switching valve. If there is a change in the HC concentration when the pressure switching valve is opened or closed, the ECM will conclude that the bladder membrane is leaking.

OBDII Code P1455 2009 Toyota Prius - Vapor Reducing Fuel Tank System Malfunction - AutoCodes.com — P1455 2009 Toyota Prius Code - Vapor Reducing Fuel Tank System Malfunction

What does this mean?

What are the Possible Causes of the DTC P1455 2009 Toyota Prius?

EVAP system large leak detected
Hose and pipe for EVAP system (broken or loose)
Fuel system
Faulty Engine Control Module (ECM)

How to Fix the DTC P1455 2009 Toyota Prius?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1455 2009 Toyota Prius 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 P1455 2009 Toyota Prius code?

Need more information on how to fix the P1455 2009 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the 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 P1455 2009 Toyota Prius Code

1. What does the OBDII code P1455 mean for a 2009 Toyota Prius?

The code P1455 indicates a Vapor Reducing Fuel Tank System Malfunction in the 2009 Toyota Prius.

2. What are the common symptoms of a P1455 code in a 2009 Toyota Prius?

Common symptoms include the Check Engine light turning on, decreased fuel efficiency, and potential fuel odors.

3. What are the possible causes of a P1455 code in a 2009 Toyota Prius?

Causes can include a loose or damaged fuel cap, a faulty charcoal canister, problems with the fuel tank pressure sensor, or issues with the EVAP system hoses.

4. How can I diagnose a P1455 code in my 2009 Toyota Prius?

Diagnosing the code may involve inspecting the fuel cap for tightness, checking the condition of the EVAP system components, and using a scan tool to monitor sensor readings.

5. Can I still drive my 2009 Toyota Prius with a P1455 code?

It is generally safe to drive the vehicle with a P1455 code, but it is recommended to address the issue promptly to prevent potential fuel system problems.

6. How do I repair a P1455 code in my 2009 Toyota Prius?

Repair steps may include tightening or replacing the fuel cap, replacing the charcoal canister or other faulty components, clearing the code with a scan tool, and conducting a subsequent drive cycle to ensure the issue is resolved.

7. Why is it important to fix a P1455 code in a 2009 Toyota Prius?

Resolving the P1455 code is crucial to maintain proper fuel system operation, prevent potential fuel leaks or emissions issues, and ensure optimal performance and fuel efficiency of the vehicle.

8. Can a P1455 code in a 2009 Toyota Prius be triggered by a one-time issue?

In some cases, the code may be triggered by a temporary problem like a loose fuel cap. If the issue is resolved and the code does not return after a few drive cycles, it may have been a one-time occurrence.

9. How much does it typically cost to repair a P1455 code in a 2009 Toyota Prius?

The cost of repairing a P1455 code can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

10. Are there any preventive maintenance steps to avoid a P1455 code in a 2009 Toyota Prius?

Regularly checking and tightening the fuel cap, inspecting the EVAP system components during routine maintenance, and addressing any fuel system issues promptly can help prevent the recurrence of a P1455 code.