P0440 – Toyota?


  • What does this mean? | P0440 TOYOTA code tech notes The P0440 code means that the control module has detected a leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the P0440 code.

How do I fix code P0440?

What repairs can fix the P0440 code?

  1. Tightening or resetting the fuel cap.
  2. Replacing a leaking fuel cap that has a bad seal or vent in the cap.
  3. Repairing or replacing leaking vapor system components like a vapor control valve or carbon canister.

Can I drive with P0440 code?

The P0440 code is not an emergency code, as it doesn’t affect your ability to drive the vehicle safely. However, it may cause a dip in your fuel economy. If you’re nearing the time to take a new emissions test, the P0440 code will cause you to fail. Also, the vapors are flammable and dangerous to breathe.

How much does it cost to fix P0440?

Expect to pay a diagnostic fee of $100 minimum for a shop to diagnose the problem. However, the repair cost can really vary depending on what is found to be wrong and the type of car. A rubber hose in the system for most cars may be replaced for under $100 parts and labor.

What causes a P0440 code?

Missing, damaged, or incorrect fuel cap – An improperly fitted or broken fuel cap is the most common cause of an OBD code P0440 being triggered. Disconnected or punctured EVAP system hoses – Over time, your car’s EVAP hoses may get brittle and become damaged, allowing fuel vapors to leak.

Can I drive with an EVAP leak?

But because an EVAP leak can potentially be a severe and environmentally damaging problem, it’s not a good idea to keep driving with the check engine light on. Whatever condition your vehicle is in—whether it’s showing symptoms of a fuel leak or not—aim to have the codes pulled as soon as possible.

What is the code P0449?

Code P0449 Meaning Hydrocarbons form smog when they react with air and sunlight. When the trouble code P0449 is set, this is an indication of the EVAP system vent valve solenoid malfunctioning which results in more hydrocarbons being expelled into the atmosphere.

What is the code P0455?

What Does Code P0455 Mean? The evaporative emission control (EVAP) system prevents fuel vapors from escaping into the atmosphere. If the EVAP system does not maintain the pressure, the ECM recognizes an evaporative emission control leak. In the case of P0455, it is a very large leak.

How do I fix code P0455?

What repairs can fix the P0455 code?

  1. Replacing the gas cap if it doesn’t tighten or seal.
  2. Replacing the fuel filler neck if it’s damaged or has anything that would prevent it from sealing with the cap.
  3. Repairing any hose problems.

How is P0440 diagnosed?

How To Diagnose And Repair Code P0440:

  1. Inspect your gas cap to see if it is loose or damaged.
  2. If the fuel cap didn’t fix it, perform an EVAP system leak check: Pinch off the vent tube to the EVAP Vent Control Valve.
  3. If the code returns, test the Purge Volume Control Valve for a Stuck Open condition.

How much is it to fix a EVAP leak?

How Much Will This Cost To Fix? Depending on where the leak is in the system and whether or not there is another damage, you can expect to pay up to $600 or so to fix a leak in your vehicle’s EVAP system.

P0440 Diagnostic Code – Trouble Code Diagnosis Guide

Evaporative Emission Control System Malfunction is a general error code that might be encountered. OBD-II code is a shorthand way of saying P0440 is a generic fault code that indicates a problem with the Evaporative Emission Control (EVAP) System. Essentially, this code indicates that something in the EVAP system is not working properly. P0440 is frequently accompanied by another code, which is often seen in the P044X chain (where “X” represents any number). The EVAP system in your Toyota is in charge of regulating the amount of gasoline vapors present in the gas tank.

When the car is operating, the vapors will be channeled into the fuel system, where they will be burned in the engine by the appropriately termed charcoal canister.

Before attempting severe diagnostics and wasting valuable time attempting to identify the source of the problem, a few simple fixes should be explored.

What Triggers The P0440 Trouble Code

When the P0440 code is the sole one that is activated, it is almost always one of three things that is happening:

  1. A damaged or leaky gas cap
  2. A malfunctioning purge solenoid
  3. Or a blocked canister are all possible causes.

Begin by removing the gas cap and visually inspecting the O-ring inside for debris or fractures before continuing. If everything is in working order, reattach it to the filler neck and tighten it with a click. When you have finished, bounce it around to see if it has any “give” from the inside to the outside – if it does, it may need to be replaced since it is possibly breaking the seal it should be creating with the filler neck. If everything appears to be in working order, remove the issue codes from the computer and drive for another day to see if they reappear.

Anything more than that will necessitate a thorough examination of the complete EVAP system, including all hoses, sensors, valves, and other components.

While every effort has been taken to ensure the accuracy and quality of this problem code summary, we cannot be held liable for any errors or omissions in the information provided.

Toyota Corolla P0440: Evaporative Emission Control System Malfunction

The P0440 problem code is one of the most often seen when driving a Toyota Corolla. When you insert your Corolla into an OBDII scanner, you will be issued a fault code that corresponds to the number you are given. Something is amiss with the EVAP system, as indicated by the code P0440. It makes no mention of what could be the source of the problem.

Error Code P0440: Evaporative Emission Control System Failure As a courtesy to inform you that something is wrong with the EVAP system, it is nearly always accompanied by, frequently occurs with, or is associated with other codes, such as the ones listed below:

P0440 is typically not a serious danger to the driveability of your Corolla. However, it can be. Certainly, once the service engine soon light comes on, it’s best to get it fixed as soon as possible; however, this isn’t always practical.

Toyota Corolla P0440 Definition

P0440 is an OBDII error code that might be encountered anywhere. This implies that no matter what make or model of car is involved, the code will always indicate the same thing (Corolla or not). Technically, the code is comprised of the following letters: Systemic Failure of the Evaporative Emission Control System The EVAP system collects all of the gasoline vapors from the fuel tank and directs them to the engine’s intake manifold for combustion. After that, they are ignited as part of the usual combustion process.

Toyota Corolla P0440 OBDII Code Symptoms

The check engine light is frequently the sole indication that the P0440 code has been activated. The P0440 code is often not accompanied by any apparent symptoms other than the smell of gasoline and the service engine soon light turning on and off. It is possible that fuel economy will deteriorate. It is possible that the area around the fuel tank will smell like gasoline. It’s also possible that there’s a fuel leak. Often, a new gas cap is all that is required to resolve this code. The EVAP system is directly involved in the vaporization of fuel.

Corolla P0440 Trouble Code Causes

When the P0440 error code is displayed in your Toyota Corolla, it might be caused by a number of different factors. The following are the most prevalent issues that can cause it to malfunction:

  • It is possible for the Evap System Hose, which transports the gasoline vapor from the fuel tank to the intake manifold, to become leaking. This will result in the P0440 error code. Take a look for a tear or a hole in the fabric. This is one of the most prevalent difficulties that results in the code being generated
  • Vessel Purge Valve – One of the most typical reasons for the P0440 code to appear is a problem with the vapor canister purge valve. It is really simple to replace. There are a couple of clips that you’ll need to locate and unclip
  • P0440 is frequently caused by a faulty charcoal canister
  • However, this is not always the case. When the gasoline sending unit is installed between the gas tank and the engine, it is possible for the gasket to become faulty. This has the potential to lower tank pressure and cause the code to be thrown. Fuel Cap – A faulty fuel cap will very certainly result in the code being thrown. Occasionally, you’ll receive a notification notifying you that the fuel cap is not in place, even when it is. Whether you are receiving that warning in addition to a P0440, it may save you a great deal of time and money to just replace the fuel cap and see if the problem is resolved. Gasoline Filler Neck – Where the fuel filler neck joins to the gas tank, a gasket is frequently used to seal the connection. This gasket is susceptible to drying out, particularly in automobiles that spend a significant amount of time in arid areas. When it dries out, the fuel tank is no longer able to maintain pressure

For more information on how to diagnose P0440, check out this YouTube video:

P0440 Diagnosis- Toyota Corolla

A mechanic has a wide variety of diagnostic tools at his disposal to figure out what is causing the P0440 code in your Toyota Corolla to display on the dashboard. The following are the most often encountered procedures for diagnosing the error code:

  • In order to determine what is causing the P0440 code in your Toyota Corolla, a mechanic will use a variety of tools and diagnostic equipment. When diagnosing a code, the following are the most often seen procedures: 1.

Most Common P0440 Fixes

The following are the most often encountered Corolla P0440 issues:

  • Replacement of the gas cap
  • Replacement of the EVAP line
  • Replacement of the charcoal canister
  • Replacement of the fuel tank

Because the gas cap is by far the easiest and least costly thing to replace on this list, it would be advisable to begin with it and work your way up to the gasoline tank. This is because the gas cap is by far the easiest and least expensive item to replace on this list. Watch this excellent video to learn how to test your gas cap. Good luck figuring out what is causing the P0440 error to appear on your Toyota Corolla’s dashboard. We hope this has been of assistance. Any additional information that you would like to share is welcome in the comments section below.

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Is P0440 a Serious Concern?

While P0440will not result in the Corolla’s engine ceasing to function, it should not be taken lightly either.

It’s possible that you have a fuel leak. Pay close attention to the level of your gasoline tank and make sure you are not leaking any petrol. We encourage that you bring it in and/or deal with it as soon as possible.

P0440 – Meaning, Causes, Symptoms, & Fixes

Malfunction of the Evaporative Emission Control System

What Does P0440 Mean?

When the EVAP system is activated, fuel vapors are prevented from being released into the environment. When the vent control valve is opened, the gasoline vapors from the fuel tank go down a vent line to the charcoal canister, where they are captured by the charcoal. The activated charcoal pellets in the charcoal canister collect and store the fuel vapors that have been absorbed and stored. The purge volume control valve regulates the amount of fuel vapor that is permitted to enter the combustion chamber.

Since the 1990s, gasoline tanks on automobiles have been sealed in this manner in order to limit the quantity of fuel that evaporates into the environment.

When the vehicle is shut off and the vent control valve is commanded closed, the ECM judges that this has occurred.

What Are The Symptoms Of Code P0440?

  • Gas cap that is missing, faulty, broken, or comes loose (*Most Common)
  • EVAP hose that is leaking or has come undone
  • Purge volume valve that is not working properly
  • Control valve for the canister vent that is not working properly
  • Leak from a charcoal canister
  • A gasoline tank that is leaking

How Serious Is Code P0440? – Low

Despite the fact that code P0440 will not create any visible driving concerns, it will cause an emissions test to fail. However, like with other diagnostic issue codes associated with the check engine light, you should get it repaired as quickly as possible in order to restore normal functionality to the vehicle.

Code P0440 Common Diagnosis Mistakes

Despite the fact that code P0440 will not create any visible driving concerns, it will trigger an emissions test failure. However, like with all diagnostic issue codes displayed by the check engine light, it is recommended that you rectify the code as soon as possible to restore normal functionality to the vehicle.

Tools Needed to Diagnose:

  • It is unlikely that code P0440 would create any visible driving problems, however it will result in a failed emissions test. However, like with any diagnostic issue codes associated with the check engine light, you should get it repaired as quickly as possible to ensure that the vehicle is back in regular functioning.

How To Diagnose And Repair Code P0440:

The difficulty in diagnosing and repairing the problem is a two-out-of-five rating.

  1. Make a visual inspection of your gas cap to see if it is loose or damaged. Tighten the gas cap if it is loose, and the error code will be cleared. Inspect your gas cap for physical damage or degradation, and replace if necessary. Although it should be noted that damage to the gas cap or degeneration of its components are not usually visible, they do occur occasionally. If your gas cap was not loose and you do not detect any signs of failure, you should replace the gas cap regardless of whether or not the codes were cleared. Gas caps are extremely affordable and are frequently used to resolve the problem with code P0440. If replacing the fuel cap does not solve the problem, examine the EVAP system for leaks: Pinch off the vent tube that leads to the EVAP Vent Control Valve and set it aside. With the use of an EVAP smoke machine leak tester, pressurize the EVAP system. Check to see if any smoke is escaping out of any hoses or seals you may have installed. Identify and fix any leaks that are present, turn off the check engine light, and double-check to see whether the problem has been remedied. Test for a Stuck Open situation on the Purge Volume Control Valve if the code appears to be returning. Remove the line from the fuel tank that connects to the Purge Volume Control Valve and unhook the electrical connector from the valve while the engine is turned off and the key is in the off position. (Conducting this test may cause another code to be set
  2. If this occurs, clear the code and discard it until the test is finished and the vehicle is reassembled.) Note: The EVAP purge volume control valve is often found on or near the intake manifold. Using a vacuum gauge or your finger, check to see whether suction is flowing from the Purge Volume Control Valve where you removed the hose. If it is, restart the engine and continue. If there is a vacuum, this indicates that the Purge Volume Control Valve is leaking and that it needs to be repaired or replaced. Even though there is no vacuum, you might still have occasional failure of the Purge Volume Control Valve or another issue with the EVAP system despite the absence of vacuum. Continuing with the diagnosis in the following step, if the purge valve passes the test, examine the EVAP vent control valve for correct operation. Continuing with the diagnosis in the next step A sticky valve, dirt clogging the valve, or a malfunctioning internal solenoid can all cause this valve to stop working. To put to the test: The EVAP vent control valve should be removed from the vehicle. In most cases, the EVAP vent control valve is positioned under the vehicle, in the back of it, beside or linked to the charcoal canister. (Technical tip: Check to see whether you can blow through the valve’s apertures while no power or ground is connected to the system. In the event that you are unable to blow through the apertures, the valve is stuck closed and has to be repaired or replaced. Now, connect power and ground to the solenoid (see your vehicle’s service manual to determine which pins to connect power and ground to), and the valve should click, and you should no longer be able to blow through the apertures. If you are able to blow through the valve when it is switched on, the valve is malfunctioning and should be replaced.*

*If the code reappears, you will need to have a professional perform additional diagnostics on your vehicle. More diagnostic tests may be required, such as electrical testing of the purge and vent control valves to ensure that they are operating properly.

Estimated Cost of Repair

If you receive error code P0440, one or more of the fixes listed below may be required to resolve the underlying problem. The estimated cost of repair for each feasible repair includes the cost of the essential components as well as the cost of the labor required to complete the repair, if any.

  • Gas Cap $20-$60
  • EVAP Line $20-$100
  • EVAP Vent Control Valve $150-$200
  • Purge Volume Control Valve $150-$200

P0440 Diagnostic Trouble Code – What You Need to Know

General malfunction of the Evaporative Emission System of the vehicle.

What P0440 really means

With the Evaporative Emission System in a car, it is possible to control the gasoline vapor that accumulates in the tank by collecting it into a charcoal canister, which will eventually release the vapor into the engine for combustion. The goal of federal emission rules is to limit the quantity of gasoline vapor (hydrocarbons) that leaks out of a poorly sealed tank and into the environment over time.

The computer checks the system on a regular basis for extremely minute breaches, which are typically between.010″ and.040″ in size. This number is frequently used in conjunction with other codes such as P0441, P0447, P0456, and so on, which help to further identify and pinpoint the problem.

What are the symptoms of a P0440 code?

Do not be alarmed; this does not imply that your car’s gasoline tank is leaking or even seeping from the bottom. Despite the fact that your gas tank may have tiny vapor leaks if it is extremely old, the most likely causes are rubber hoses or motorized vents that direct the vapors to storage before being released back into the atmosphere. For the vast majority of drivers, these minor vapor leaks go unnoticed since they have little impact on performance or fuel efficiency.

What is the severity of a P0440 code?

Minor. It is necessary to prepare for repairs in order to address the problem, but there is no imminent threat of the vehicle breaking down or operating inadequately.

What repair(s) are needed to resolve a P0440 code?

If you have a rubber hose or a motorized vent (exhaust system), repairs should be made to address the problem, but there is no imminent threat that the automobile will break down or perform poorly. Make an appointment at a time that is convenient for you, and plan on dropping off your car for at least one day while it is being diagnosed and fixed. It takes time and care to locate these little leaks or damaged valves in the system.

What is the cost to resolve a P0440 code?

  • Estimated diagnostic cost: $100
  • Estimated part(s) + labor cost: under $100–
  • Estimated total cost: under $100–

An estimated $100 minimum diagnostic price should be expected for a business to properly diagnose the problem. The cost of repair, on the other hand, might greatly vary depending on what is discovered to be incorrect and the type of vehicle. Most automobiles have a rubber hose in their system that can be changed for less than $100 in materials and labor. It is possible that the price will increase significantly if any of the valves, storage container, or gasoline tank (including the filler neck) are discovered to be leaking.

Keep in mind that price will vary depending on your location as well as the type and model of your car.

Written by an ASE Master Technician, this service article provides information on Obtain price quotes from neighboring businesses.

P0440/441/446 – VSV’s are ok

For a shop to identify the problem, expect to pay a diagnostic cost of at least $100.00. In reality, the cost of repairs might vary significantly depending on the nature of the problem and the kind of vehicle. It is possible to replace a rubber hose in the cooling system of most autos for less than $100 in components and labor. It is possible that the price will rise dramatically if any of the valves, storage container, or gasoline tank (including the filler neck) are discovered to be leaking.

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Be aware that prices will vary depending on your location as well as the make and model of your car.

Make use of Openbay to compare prices and schedule an appointment with a local service facility if you haven’t already done so to save time and money. Written by an ASE Master Technician, this service article will help you. Obtain price quotes from local businesses in your neighborhood.

2003 Toyota Corolla P0440 EVAP Control Malfunction.

P0440 OBD-II Trouble Code – Malfunction of the Evaporative Emission Control System The presence of Trouble Code P0440 indicates that the EVAP control system in your 2003 Toyota Corolla is malfunctioning. The EVAP system in your Toyota is made up of a number of components, including the gas cap, gasoline lines, carbon canister, EVAP purge valve, and other hoses. The EVAP system is designed to prevent gasoline vapors from escaping from a vehicle’s fuel system. Fuel vapors are directed to the EVAP charcoal canister, where they are collected and stored.

  • What is the source of the Trouble Code P0440?
  • Some options for resolving error number P0440 include the following: * Remove the gas cap and replace it with a new one.
  • * * Check and/or replace the EVAP pressure sensor on your Toyota Corolla if any of the vapor hoses are broken or disconnected.
  • Examine and/or replace the EVAP purge valve if necessary.

P0440 Code: EVAP System Malfunction (Symptoms, Causes, and Fixes)

The most recent update was made on November 10, 2021. The internal functions of your car produce fumes, which are then released into the atmosphere. Under the Clean Air Act (CAA), which was established by the Environmental Protection Agency (EPA), the amount of vapor a vehicle can produce before it exceeds a certain level is regulated. Are you looking for a reliable online repair manual? The top five choices may be found by clicking here. Some of the hazardous fumes are produced during the process of gasoline being transported to the engine.

EVAP is an acronym for evaporative emission control system.

As soon as it is necessary, the purge valve in the EVAP system transfers the gases to the engine, where they are ignited and expelled.

When there is a problem with the exhaust gas aftertreatment system, such as a leak, the P0440 engine code is displayed.

What Does Code P0440 Mean?

P0440 is an OBD-II trouble code that has a description. Systemic Failure of the Evaporative Emission Control System The P0440 code is a generic number, which means that the vehicle has an issue with its EVAP system, albeit the code does not specify where the fault is located. There are several moving pieces in that system, and any one of them might have an impact on the entire system. It’s possible that the problem is with the gas cap, carbon canister, one of the fuel lines, the purge valve, or any of the hoses on the vehicle in question.

EVAP leaks are detected by an internal computer that checks for them on a regular basis.

It may detect leakage as tiny as 0.10″. Usually, the P0440 error code is accompanied by another error code. The code that is included with this document provides more insight into where the problem might be found. P0440 is frequently associated with the following codes:

  • Description of OBD-II Trouble Code P0440 Malfunction of the Evaporative Emission Control System As a general rule, the P0440 error number indicates a problem with the EVAP system, however it does not specify where the problem is located. There are several moving pieces in that system, and any one of them might have an impact on the whole system. One of the fuel lines, the purge valve, or any of the hoses might be clogged with debris, which would indicate an issue with the gas cap or carbon canister. When the vehicle’s testing system is activated, the P0440 error code is shown. In the EVAP system, the internal computer performs frequent inspections for leaks. It is capable of detecting gaps of 0.10″ in diameter. When the P0440 error code is encountered, another code is usually associated with it. There is further information about where the problem is located in the following code. P0440 is associated with the following codes:

Symptoms of Code P0440

Code P0440 manifests itself in subtle ways, with the check engine light being the first to illuminate. If you are used to waiting for your check engine light to be diagnosed, you may not want to do so here because the service is free. Some expensive problems have no visible indications other than the presence of a check engine light. The only other symptom you could notice if you get a P0440 code is a strong scent of gasoline. When fuel vapor is seeping from your car, you may be able to smell it while within or around your vehicle.

Otherwise, your automobile will continue to work normally, as this problem has no effect on the drivability or fuel efficiency of your vehicle.

Additionally, because it is one of the more reliable and stable systems in your car, the EVAP system is rarely in need of maintenance.

Causes of Code P0440

The P0440 code is shown when two components of the vehicle are not functioning properly: the EVAP systems and the electronic control module (ECM). The EVAP system is tested using the ECM, which is a computer that executes the tests. The P0440 code is shown if the vehicle detects a reduction in fuel pressure while performing the tests. A slight decrease in pressure is OK, but not a large decrease. A loose or improperly fitted gas cap will often result in a drop in pressure, and mechanics are frequently confronted with this issue.

  • The gasoline vapor pressure sensor is not working properly
  • The purge solenoid is not functioning properly. The fuel canister is not functioning properly. Purge valve that is not working properly

Is Code P0440 Serious?

It is not necessary to call for assistance if the P0440 code is shown because it does not impair your ability to operate the vehicle safely. However, it is possible that your fuel economy would suffer as a result of this. You will fail the P0440 code if you are about to take another emissions test and the time has come for you to do so. It’s also important to note that the fumes are combustible and hazardous to inhale. Despite the small amount of gas expelled, the concentration of the gases increases over time.

Any code that causes the light to illuminate necessitates a diagnostic examination as soon as feasible.

How to Fix

In order for a diagnostics check to be performed on your car, you should plan on leaving it for at least a day. Due to the small size of these leaks, they can be difficult to detect and repair. The first thing you or a professional should attempt is to tighten the gas cap, after which you should use anOBD2 scanner to clear the error code. If it doesn’t work, it’s possible that changing the gas cap completely will. While it is possible that the gas cap did not cause or contribute to the leak, it may be beneficial for the vehicle to have it replaced at some time in the future.

The following step is to replace or repair any vapor system components that are malfunctioning.

You should have the vapor purge valve and the vent valve examined before proceeding to the next step.

The smoke test involves injecting smoke into the system to assist locate any leaks.

Last but not least, look beneath the hood for any broken or loose hoses. Realistically, the remedy is most likely to tighten the gas cap on the tank of gas. The P0440 error code is a frequent problem that is typically straightforward to resolve.

 Camry P0440, P0441, P0446

A service bulletinEG013-02 has been published to solve the problem with the Solara and Camry P0440, P0441, and P0446 trouble codes that were present in 1998-1999 models of these vehicles. As stated in the notice, you may encounter the problem codes P0440, P0441, and P0446 on a Solara or Camry depending on the circumstances. Most other EVAP test systems function in a similar manner to the evaporative emissions system in Toyota automobiles. The charcoal canister serves as a storage container for fuel vapors.

In other vehicles, this valve is referred to as the canister purge valve or the canister purge valve.

Vapor Pressure Sensor VSV: The second VSV valve is referred to as the Vapor Pressure Sensor VSV, and it is designed to close to the atmosphere so that the vapor pressure sensor can monitor fuel tank pressure and vacuum in order to identify an EVAP leak.

The problem is usually a bad VSV

A service bulletinEG013-02 has been released to resolve the problem with the Solara and Camry P0440, P0441, and P0446 trouble codes in the years 1998-1999. As stated in the notice, you may encounter the problem codes P0440, P0441, and P0446 on a Solara or Camry in certain circumstances. Evaporative emissions testing in Toyota automobiles is performed in the same manner as other EVAP testing systems. The charcoal canister is used to hold fuel vapors. Immediately following a gasoline fill-up, the system activates the EVAP vacuum switching valve (VSV) in the engine compartment, which allows gas vapors from the charcoal canister to be sucked into the system.

The engine receives fresh, filtered air from the charcoal canister, which draws in the fuel vapors.

VSV is an abbreviation for Vapor Pressure Switch.

2000 Avalon EVAP problem code P0440

Here is what someone wrote about the 440 issue on the internet: The enigma of the code has been solved I thought I’d share my expertise in hunting out the main cause of this error code with you. P0440 is an abbreviation for vacuum leak. There are several locations to look. 1. I replaced all of the hoses that seemed questionable. 2. Mityvac was used to examine all of the vacuum actuators (they should all hold a vacuum, if not their junk) 3. verified that all vsvs were in proper working order. There are four of them in the front of the automobile.

  • Then I reassembled everything and it worked perfectly.
  • The problem was resolved by replacing the back vsv and repairing the blue vsv.
  • The brown and black vsvs will not entirely fill a vacuum, but the others will do so successfully.
  • When tested, the blue vsv, the one affixed to the air cleaner, and the one mounted to the charcoal canister all produced a strong suction.
  • You may also look for additional information on Toyotanation by searching for “P0440 and vsv.” The P0440 problem has occurred on two of my vehicles, and I have put the VSV at the cannister, where there is just one bolt or nut and the VSV is directly in front of you.

According to my memory, the component cost $70 at the dealer. I’m going to guess that your gas cap is a Toyota product.

OBD-II Trouble Code: P0440 Evaporative Emission Control System Malfunction

Systemic Failure of the Evaporative Emission Control System

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What does that mean?

This diagnostic trouble code (DTC) is a general powertrain code, which means that it applies to any cars that are equipped with the OBD-II diagnostic system. Despite the fact that they are general, the particular repair processes may differ based on the make and model. Typically, this implies that a component of the EVAP control system is no longer operating properly. EVAP systems are composed of a number of components, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and several additional hoses and fittings.

Fuel vapors are transferred through hoses to a charcoal canister, where they are collected and stored.


It’s unlikely that you’ll encounter any difficulties while driving.


A code P0440 might indicate that one or more of the following events have occurred:

  • The gas cap is not properly placed or functioning
  • The purge solenoid has failed to function properly. The canister is plugged in and is not functioning correctly.

Possible Solutions

When dealing with an OBD-II issue code such as P0440, diagnostics might be difficult at times. Here are some ideas to get you started:

  • Diagnoses might be difficult when a P0440 OBD-II issue code is present. Some items to consider are as follows:

P0440 Repair Video

When dealing with an OBD-II issue code such as P0440, diagnostics might be difficult. Here are a few ideas to get you started:

Related DTC Discussions

  • P0446/P0440/P0441 I’m driving my first car (a Toyota Corolla LE from 2001 with 42000 kilometers) and it failed roadside inspection this morning, which is a first in my life. The fault codes are as follows: 1) P0446: Evaporative Emission Control System Vent Control Circuit
  • And 2) P0447: Evaporative Emission Control System Vent Control Circuit. 2) P0441: Incorrect purge flow from the evaporative emission control system. The 2001 Chevrolet Cavalier P0440 EVAP Code is identified as follows: CHECK THE ENGINE HELP! We have a 2001 Chevrolet Cavalier with a 2.2-liter engine that we recently purchased secondhand. It was sold because a neighbor girl informed the seller that an EVAP part worth $300 was required. This is where we are right now. Autozone has tested it a total of four times thus far. We receive the P0440 error code. I went out and purchased a GAS CAP as well as clearing the codes. The CHECK ENGINE LIGHT is on
  • Nissan Code P0446P0440. My Nissan Sentra was manufactured in 1997. Service Engine is a program that provides services to customers. The other day, the lights came on quickly. Auto Zone was able to extract the codes P0446 and P0440, which are related to the purge/vent solenoid for the EVAP. Three days before the light turned on, I changed the oil in a car belonging to a buddy for the first time in my life. Codes for the oil filter
  • 2000 Chevrolet S-10 2.2L 4 cyl 5 speed transmission P0325, P0440, B1001, U1000, C0265, P0325, P0440, B1001, U1000, C0265 Hello, first and foremost, thank you SO MUCH for making it possible for folks like myself to contact you! Unfortunately, while on my route to Texas for my sister’s burial, my Chevy Siverado caught fire and burned to the ground. So, in order to make it to Texas, I had to purchase the previously stated S-10. It surrounded me as I tried to get back home
  • I was doomed from the start! the following: P0133, P0420, P0440, P0441, and P0446 Hello everyone, I’m writing to express my gratitude for your time and consideration. As always, you and your colleagues are doing an excellent job! I drove my Corolla 2002 (108000 miles) to two different technicians yesterday since the check engine lights have been up for more than two months. I had acquired this automobile three months prior, and the Firestone technician had assured me that it was safe to purchase and that it had no faults. I am s
  • P0440 after a p0446. For several weeks, I was plagued by the P0446 error code. The gasoline tank pressure sensor was changed last weekend, which I completed on Saturday. A new code, the p0440, surfaced twice this week after the 446 had disappeared. What should I be on the lookout for right now. I’d never gotten that code before I replaced the tank pressure switch
  • I’d also updated the oxygen sensor and cat, but I was still getting P0133, P0420, and P0440 codes. To be honest, the 440 and 442 have little to do with the others. Allow me to detach them for a moment since they are in fact EVAP. You replaced the O2 sensor, but the indicator remained on and the codes remained active since you failed to clear the codes before replacing the sensor. Second, you did not replace the catalyst when it failed. Both P0133 and P0130 would be present in a 1999 3.4L V6 Grand Am with DTC P0440 (Evaporative Emission (EVAP) System) and DTC P0440 (Evaporative Emission (EVAP) System). The following are the requirements for establishing the DTC: During the diagnostic test, the EVAP system was unable to establish or sustain a vacuum. Approximately six months ago, the gasoline pump was replaced with a new aftermarket component. I was receiving the following codes before and after pump replacement: 2001 Chevy Cavalier with P0440 EVAP code. I purchased a 2001 Chevrolet Cavalier about a month ago, and it was in excellent condition. It was a few weeks ago that my check engine light came on, so I went to Advance and had my codes read (I have a buddy who works at Advance), and there was a P0440 EVAP code, so my friend examined the gas cap, and there was moisture on it, so my friend
  • P0440 Chevrolet Cavalier (2003 model year) My daughter’s vehicle is a 2003 Chevrolet Cavalier with 91,000 miles on the odometer. A few weeks ago, the check engine light illuminated with the P0440 trouble code. Here’s what I’ve done so far in an attempt to rectify the situation. 1. A brand new OEM gas cap. 2. Replaced the Canister vent solenoid in the back of the vehicle and inspected all wires for damage or fraying. 3. It was done

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p0440 and how I fixed it.

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Evaporative cooling system, polution system, and CEL are all code P0440. Hello, I’m publishing this in the hopes that it will be of assistance to someone who is experiencing a CEL with the P0440 code. This number indicates that there is a kink in the air hose in the exhaust ventilation system. My car is a 2001 GTS. I was a little apprehensive at first. It was decided to have Auto Zone look at the code. They recommended that we get a new gas cap. At Autozone, I had the gas cap replaced. The code was returned.

The car was running OK, and there were no performance issues, but the check engine light would not turn off.

I purchased an online OBD2 blue tooth scanner, and sure enough, it was only picking up the P0440 error code.

After a while, I took it to the dealer for an evaluation.

As a result, I obtained new gas cap from the dealership.

After roughly 90 miles, the light came back on again.

According to them, for $1,800 they would repair the charcoal canister as well as drop the gas tank in order to replace the overfill check valve in the engine compartment.

I read through the instructions, took out some information, and colored in some pictures to figure out where everything was and what it was.

Hoses for Charcoal Canisters I tested the functions of the hoses that led to the motor and found them to be OK.

I went through my car looking for the items that the dealer was going to replace.

The part number for my car’s overfill check valve was 77390-20070.

I spoke with others who advised me to remove the gas tank from the vehicle.

While I was disassembling the fuel pump and other components, I saw that the valve was only a few inches away from the access hole.

I applied some silicone around the region where I had been cut so that I wouldn’t be hurt while working in that area.

There was a metal cap on top of the container that was simple to remove.

I was relieved to be working at the top of the building.

Pushing back keepers under a retaining ring using two extremely small screwdrivers, and then pushing the hose off with a third screwdriver After the hose was freed, just spin the valve and take it out from the top of the hose.

I figured I’d try to repair the overfill check valve because it was in such convenient location.

I drove almost 250 miles and the CEL remained illuminated.

The evap was equipped with yet another of those durable hose couplings.

placed everything back together in its proper place CEL remained on for the whole 90-mile drive.

When it didn’t work, I was prepared to replace the charcoal evap and see if that made any difference.

A tiny piece of metal about 4″ x 6″ was used to hide the extra access hole, which was kept in place with duct tape.

After that, I simply reinstalled the rear seat and was ready to go. It appears that the problem with the overfill check valve was rather frequent on other Toyotas as well. I hope this was of assistance! Wishing you the best of luck

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