AutoCodes – Toyota – P1455 2005 Toyota Prius

P1455 2005 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 2005 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 4,136

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 2005 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 2005 Toyota Prius - Vapor Reducing Fuel Tank System Malfunction - AutoCodes.com — P1455 2005 Toyota Prius Code - Vapor Reducing Fuel Tank System Malfunction

What does this mean?

What are the Possible Causes of the DTC P1455 2005 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 2005 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 2005 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 2005 Toyota Prius code?

Need more information on how to fix the P1455 2005 Toyota Prius code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1455 2005 Toyota Prius 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 P1455 2005 Toyota Prius Code

1. What are common symptoms of OBDII code P1455 in a 2005 Toyota Prius?

- Common symptoms include the check engine light coming on, decreased fuel efficiency, and potentially a strong fuel odor.

2. What does the OBDII code P1455 indicate in a 2005 Toyota Prius?

- The code indicates a malfunction within the Vapor Reducing Fuel Tank System.

3. What are possible causes of OBDII code P1455 in a 2005 Toyota Prius?

- Possible causes include a loose gas cap, a faulty charcoal canister, a leak in the fuel tank system, or issues with the fuel tank pressure sensor.

4. How can I diagnose OBDII code P1455 in my 2005 Toyota Prius?

- Diagnosing the issue may involve checking the gas cap for tightness, inspecting the charcoal canister and hoses for damage, and testing the fuel tank pressure sensor.

5. How can I repair OBDII code P1455 in my 2005 Toyota Prius?

- Repair methods may include tightening or replacing the gas cap, replacing the charcoal canister, repairing any leaks in the fuel tank system, or replacing the fuel tank pressure sensor.

6. Can I continue driving my 2005 Toyota Prius with OBDII code P1455?

- It is recommended to address the issue as soon as possible to prevent potential damage to the vehicle's emission control system and to ensure optimal performance.

7. Is it possible to reset the OBDII code P1455 in a 2005 Toyota Prius without fixing the issue?

- While you can clear the code temporarily, it is not recommended as the underlying problem will persist and may lead to further issues down the line.

8. How much does it typically cost to repair OBDII code P1455 in a 2005 Toyota Prius?

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

9. Are there any preventative maintenance tips to avoid OBDII code P1455 in a 2005 Toyota Prius?

- Regularly checking and tightening the gas cap, inspecting the fuel tank system for leaks, and following the manufacturer's maintenance schedule can help prevent this issue.

10. Can a DIY enthusiast with basic mechanical skills fix OBDII code P1455 in a 2005 Toyota Prius?

- Depending on the specific cause, some repairs related to P1455 may be feasible for DIY enthusiasts, such as checking and tightening the gas cap. However, more complex issues may require professional assistance.