P0456 Toyota Code - Evaporative Emission Control System Very Small 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
- P0456 Toyota indicates Evaporative Emission Control System Very Small 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.
Code P0456 Toyota Description
The Canister Pump Module is attached to the EVAP Canister and contains the Canister Pressure Sensor, the Leak Detection Pump, and the Vent Valve.
What are the Possible Causes of the DTC P0456 Toyota?
- 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 P0456 Toyota?
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.
Code Tech Notes
2003-2004 Toyota Corolla
2003-2005 Toyota Matrix
Toyota Factory Service Bulletin OBDII Code P0456 Corolla and Matrix
2003-2004 Toyota 4Runner
2003-2004 Toyota Tundra
2004 Toyota Camry
2004 Toyota Sienna
2004 Toyota Highlander
2004 Toyota Solara
Toyota Factory Service Bulletin OBDII Code P0456
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0456 Toyota 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 P0456 Toyota code?
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Need Help with the Code?
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Information for Specific Toyota Models
- P0456 2006 Toyota Camry — EVAP Control System Leak Detected Very Small Leak
- P0456 2007 Toyota Camry — EVAP Control System Leak Detected Very Small Leak
- P0456 2008 Toyota Camry — EVAP Control System Leak Detected Very Small Leak
- P0456 2009 Toyota Camry — EVAP Control System Leak Detected Very Small Leak
- P0456 2010 Toyota Camry — EVAP Control System Leak Detected Very Small Leak
- P0456 2011 Toyota Camry — EVAP Control System Leak Detected Very Small Leak
- P0456 2001 Toyota Highlander — EVAP Control System Leak Detected Very Small Leak
- P0456 2002 Toyota Highlander — EVAP Control System Leak Detected Very Small Leak
- P0456 2003 Toyota Highlander — EVAP Control System Leak Detected Very Small Leak
- P0456 2004 Toyota Highlander — EVAP Control System Leak Detected Very Small Leak
- P0456 2005 Toyota Highlander — EVAP Control System Leak Detected Very Small Leak
- P0456 2006 Toyota Highlander — EVAP Control System Leak Detected Very Small Leak
- P0456 2007 Toyota Highlander — EVAP Control System Leak Detected Very Small Leak
- P0456 2004 Toyota Prius — EVAP Control System Leak Detected Very Small Leak
- P0456 2005 Toyota Prius — EVAP Control System Leak Detected Very Small Leak
- P0456 2006 Toyota Prius — EVAP Control System Leak Detected Very Small Leak
- P0456 2007 Toyota Prius — EVAP Control System Leak Detected Very Small Leak
- P0456 2008 Toyota Prius — EVAP Control System Leak Detected Very Small Leak
- P0456 2009 Toyota Prius — EVAP Control System Leak Detected Very Small Leak
- P0456 2013 Toyota RAV4 — Evaporative Emission Control System Very Small Leak Detected
- P0456 2014 Toyota RAV4 — Evaporative Emission Control System Very Small Leak Detected
- P0456 2015 Toyota RAV4 — Evaporative Emission Control System Very Small Leak Detected
- P0456 2016 Toyota RAV4 — Evaporative Emission Control System Very Small Leak Detected
- P0456 2017 Toyota RAV4 — Evaporative Emission Control System Very Small Leak Detected
- P0456 2018 Toyota RAV4 — Evaporative Emission Control System Very Small Leak Detected
Frequently Asked Questions about P0456 Toyota Code
1. What are common symptoms of OBDII code P0456 in a Toyota?
- Common symptoms include the illumination of the check engine light, a gasoline odor around the vehicle, and potential difficulty in passing emissions tests.
2. What are the typical causes of OBDII code P0456 in a Toyota?
- Common causes of code P0456 include a loose or damaged gas cap, a leak in the evaporative emission control system, a faulty purge valve, or a damaged charcoal canister.
3. How can I diagnose the source of the very small leak for code P0456 in my Toyota?
- A smoke test can be performed by a mechanic to visually identify the leak in the evaporative emission control system. Checking the gas cap and inspecting hoses for damage are also recommended.
4. Can a loose gas cap trigger OBDII code P0456 in a Toyota?
- Yes, a loose or improperly sealed gas cap is a common cause of code P0456. Ensure the gas cap is tightened properly and try clearing the code to see if it reoccurs.
5. Is it safe to continue driving my Toyota with OBDII code P0456 present?
- While the vehicle may still be safe to drive with code P0456, it is recommended to have the issue diagnosed and repaired promptly to prevent further damage to the emission control system.
6. Can I repair OBDII code P0456 in my Toyota myself?
- Depending on your mechanical skills, you may be able to address simple causes like a loose gas cap. However, diagnosing and repairing more complex issues may require professional assistance.
7. How much does it typically cost to repair OBDII code P0456 in a Toyota?
- The cost of repairing code P0456 can vary based on the root cause of the issue. Simple fixes like tightening a gas cap may be inexpensive, while replacing components in the emission control system can be more costly.
8. Will resetting the check engine light clear OBDII code P0456 in a Toyota?
- Resetting the check engine light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is recommended to diagnose and repair the problem to prevent recurring codes.
9. Can extreme weather conditions trigger OBDII code P0456 in a Toyota?
- Extreme temperature changes or weather conditions can sometimes affect the evaporative emission control system, potentially leading to code P0456. Ensuring all components are properly sealed and functioning can help prevent issues.
10. How important is it to address OBDII code P0456 in a Toyota promptly?
- It is important to address code P0456 promptly to maintain proper emissions control and prevent potential damage to the vehicle's components. Ignoring the issue could lead to more severe problems over time.
Discuss the causes and fixes for P0456 Toyota OBDII Code
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So I have a 2012 Toyota Camry SE with 75000 miles on it. I started it the other day and the check engine light came on. I haven't had any engine failure or problems starting it at all but over the past month or so I've noticed a significant lack of acceleration from time to time. I got code P0456 and P1604. I don't use mid or premium gas. My fuel cap is position tightly. What is my course of action?
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Neither of the two codes will cause a lack of acceleration. Have you tried clearing the codes? how long it takes for the codes to come back?
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I can't believe someone took the time to leave a video on how to change out the gas cap. Let alone MAKE a video showing how to change out a gas cap. I'm no mechanic but my proffesonal opinon is. If you can't figure out how to replace your gas cap. Not only should you not own a code reader. You probably shouldn't be driving.
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