AutoCodes – Toyota – P1455 2007 Toyota Prius

P1455 2007 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 2007 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 3,950

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 2007 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 2007 Toyota Prius - Vapor Reducing Fuel Tank System Malfunction - AutoCodes.com — P1455 2007 Toyota Prius Code - Vapor Reducing Fuel Tank System Malfunction

What does this mean?

What are the Possible Causes of the DTC P1455 2007 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 2007 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 2007 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 2007 Toyota Prius code?

Need more information on how to fix the P1455 2007 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 2007 Toyota Prius Code

What does OBDII code P1455 mean for a 2007 Toyota Prius?

OBDII code P1455 indicates a malfunction in the vapor reducing fuel tank system, which is responsible for controlling fuel vapors and preventing them from escaping into the atmosphere.

What are the common symptoms of a P1455 code?

Common symptoms include the check engine light being illuminated, fuel odor near the vehicle, and potential issues with refueling (such as difficulty filling the tank).

What could cause the P1455 code to trigger?

Possible causes include a faulty fuel tank pressure sensor, a defective charcoal canister, leaks in the vapor lines, or issues with the fuel filler neck.

Can I drive my 2007 Prius if the P1455 code is present?

While you can drive the vehicle, it is advisable to address the issue soon, as it may affect fuel efficiency and could lead to more severe problems if left unresolved.

How can I diagnose the P1455 code?

Start by using an OBDII scanner to confirm the code. Then, visually inspect the fuel vapor system components, including hoses and connections, for leaks or damage.

What repairs are typically needed for a P1455 code?

Repairs may involve replacing a faulty fuel tank pressure sensor, sealing any leaks in the vapor lines, or replacing the charcoal canister if it is damaged.

Is it safe to ignore the P1455 code?

Ignoring the P1455 code is not recommended, as it can lead to increased emissions, potential fuel efficiency issues, and may eventually cause more serious engine problems.

How much does it usually cost to fix the P1455 code?

Repair costs can vary widely depending on the specific issue, but typical repairs may range from $100 to $600, depending on whether you need to replace sensors, hoses, or the charcoal canister.

Can the P1455 code be cleared without repairs?

Yes, the code can be cleared with an OBDII scanner, but it is important to address the underlying issue; otherwise, the code will likely reappear.