AutoCodesToyota – P0455 2015 Toyota RAV4

P0455 2015 Toyota RAV4 Code - Evaporative Emission Control System Gross Leak Detected

Quick Answer

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. Common causes include Missing or loose filler 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 2015 Toyota RAV4 indicates Evaporative Emission Control System Gross Leak Detected.
Common causes
Common causes include Missing or loose filler 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 538
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 31, 2022
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Code P0455 2015 Toyota RAV4 Description

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure. The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is between 97 to 100 kPa(abs) [726 to 750 mmHg(abs) (Typical value)] and saturated within a minute. If the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than [second reference pressure x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large leak, illuminates the MIL, and stores the Diagnostic Trouble Code (DTC).
The Canister Pump Module is attached to the EVAP Canister and contains the Canister Pressure Sensor, the Leak Detection Pump, and the Vent Valve.
OBDII Code P0455 2015 Toyota RAV4 - Evaporative Emission Control System Gross Leak Detected - AutoCodes.com
P0455 2015 Toyota RAV4 Code - Evaporative Emission Control System Gross Leak Detected

What are the Possible Causes of the DTC P0455 2015 Toyota RAV4?

  • Missing or loose filler fuel cap
  • Incorrect fuel filler cap used
  • Fuel filler cap remains open or fails to close
  • Foreign matter caught in fuel filler cap
  • Leakage from canister pump module
  • Leakage from fuel tank
  • Leakage from canister

How to Fix the DTC P0455 2015 Toyota RAV4?

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 P0455 2015 Toyota RAV4 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 2015 Toyota RAV4 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 2015 Toyota RAV4 Code

1. What does OBDII code P0455 mean on a 2015 Toyota RAV4?

P0455 indicates a "Gross Leak Detected" in the Evaporative Emission Control (EVAP) system, meaning a large leak or disconnection is present.

2. What are the common symptoms of code P0455 in a 2015 Toyota RAV4?

Symptoms may include the check engine light turning on, a noticeable fuel smell near the vehicle, and, in rare cases, slightly reduced fuel efficiency.

3. What causes code P0455 in a 2015 Toyota RAV4?

Common causes include a loose or damaged gas cap, a cracked or disconnected EVAP hose, a faulty purge valve, a defective charcoal canister, or a leak in the fuel tank.

4. Can a loose gas cap trigger code P0455 on a 2015 Toyota RAV4?

Yes, a loose, missing, or damaged gas cap is one of the most common causes of a P0455 code.

5. How do I fix code P0455 on a 2015 Toyota RAV4?

Start by tightening or replacing the gas cap, then inspect EVAP hoses and components for damage or disconnections. If the issue persists, a professional diagnostic may be required.

6. Is it safe to drive a 2015 Toyota RAV4 with code P0455?

Yes, it is generally safe to drive with this code, but it should be addressed promptly to avoid potential fuel vapor leaks and ensure proper emissions control.

7. How can I diagnose code P0455 on a 2015 Toyota RAV4?

Check the gas cap for tightness and damage, inspect EVAP system hoses for cracks or disconnections, and use a smoke test to detect large leaks in the system.

8. How much does it cost to fix code P0455 on a 2015 Toyota RAV4?

Repairs can range from under $20 for a gas cap replacement to $200–$600 or more for complex EVAP system repairs, depending on the exact issue.

9. Can extreme weather cause code P0455 on a 2015 Toyota RAV4?

Yes, extreme heat or cold can cause EVAP components, such as hoses, to crack or loosen, potentially triggering this code.

10. Will clearing the P0455 code solve the problem on a 2015 Toyota RAV4?

Clearing the code will turn off the check engine light temporarily, but the underlying issue must be fixed to prevent the code from returning.

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