Ошибка p0456 nissan murano

One of the most common trouble codes with the Nissan Murano is the P0456 code. This trouble code references a number that is given to you when you plug your Murano into an OBDII scanner.

P0456 Indicates that there is a small leak in the evaporative emission control system. It often appears with or is related to other codes, such as P0420, P0441, and very often P0440.

P0456 is normally not an immediate threat to the driveability of your Murano. Certainly, anytime the service engine soon light is on, it’s good to deal with it as soon as possible.

While the trouble code may state that there is a “small leak” in the EVAP system of your Nissan Murano, it is actually referring to the amount of pressure loss and not the physical size of the leak.

P0456 Quick Info

Nissan Murano P0456 Definition:  EVAP Leak (Small)

P0456 is a universal OBD II trouble code. This means that regardless of vehicle make or model, the code will mean the same thing (Murano or not). The code technically stands for evaporative emission system small leak detected.

Evaporative Emissions System 

The EVAP system captures all fuel vapor from the fuel tank and sends them to the engine’s intake to be ignited during the normal combustion process.  Its primary function is emissions reduction. 

Small Leak

A small EVAP leak should not change the way your engine runs nor be considered a breakdown risk.

When there is a small leak in the Nissan Murano’s EVAP system, it will throw the P0456 OBDII Code. If there is a large leak, it’ll throw P0455.

Nissan Murano P0456 OBDII Code Symptoms

P0456 code will typically not be accompanied by any noticeable symptoms other than the smell of gas and the service engine soon light.

• Gas Smell– You may smell fuel vapor around the fuel tank area or fuel filler tube.
• Check engine light– P0456 may be accompanied by other EVAP-related trouble codes.  If there are, they may help you pinpoint where the leak is coming from.

The EVAP system deals directly with fuel vapor. If fuel vapor is leaking from the system, you may smell it faintly while driving your Murano. But it won’t affect the way the engine itself runs.

Murano P0456 Trouble Code Causes + Diagnosis

There are many things that can cause the P0456 trouble code to trigger in your Nissan Murano. If your Murano has warned you at all in the last few months that the fuel cap was off when it wasn’t, then replacing it would be a great first step.

Here are the most common problems that will throw the code, presented in order (somewhat) from most to least likely:

Fuel Cap

Your Murano’s fuel cap prevents fuel vapor from escaping the fuel tank.  If the gas cap has failed, you’ll likely get a message informing you that the fuel cap is off even when it is on. If you are getting that message, plus a P0456, replace the fuel cape.

Evap System Hose

The EVAP hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. This will cause the P0456 code. Look for either a tear or a hole in it. This is one of the most common issues that cause this code.

Vapor Canister Purge Valve

One of the most common causes of the P0456 code is the vapor canister purge valve. It’s really easy to replace. There are a few clips that you need to find and remove. Your Murano’s purge valve location and style will depend on the model year and engine equipped.

Fuel Tank Sending Unit

It is possible for the gasket that attaches the fuel-sending unit to the gas tank to go bad. This can reduce tank pressure and throw the code.

Fuel Filler Neck

There is often a gasket where the fuel filler neck connects with the gas tank. This gasket can dry out, especially with vehicles that spend their time in dry climates. When it dries out, the fuel tank can’t hold pressure anymore. 

A leaking fuel tank can also cause P0456 in the Nissan Murano, but it’s not as common as a bad fuel filler neck or sending unit.

P0456 Diagnosis- Nissan Murano

A mechanic has a wide range of instruments at his disposal to diagnose what would be causing the P0456 in your Nissan Murano. Here are the most common things that are done to diagnose the code:

• A mechanic will typically check to see if there are any other trouble codes. The more trouble codes there are, the easier it can be to diagnose a problem. That’s because when they appear together in certain combinations, there will often only be a few conditions that throw any combination of codes at once.
• After ascertaining what trouble codes appear with the P0456, the mechanic will typically inspect the EVAP system. This includes the purge valve, line, and canister.
• The mechanic will inspect the gas cap to make sure that it can handle pressure. If you are getting a warning that your gas cap is off, even when it’s on, replacing it will more than likely clear this code.
• The fuel tank and charcoal canister vent pressure will be checked and monitored.
• After the checks and fixes listed above, the mechanic will perform two tests: A smoke test (using a smoke machine), and they’ll use a scan tool to confirm that the EVAP system is functioning properly.

Most Common P0456 Fixes

Here are the most common Murano P0456 fixes:

• Gas cap replacement
• EVAP line replacement
• Replace charcoal canister
• Purge solenoid

Of all the items listed above, it would be wise to start with the gas cap and work your way to the fuel tank since the gas cap is far and away the easiest and least expensive item to replace.

Here’s a great video on how to test your gas cap.

Good luck figuring out what is causing your Nissan Murano to throw the P0456 code. We hope this helps. If there is anything that you feel you could add, please feel free to leave a comment below.

Is P0456 a Serious Concern?

While P0456 is not going to cause your Murano’s engine to stop running, it should not be treated lightly. You could have a fuel leak. Pay extra attention to your tank level and make sure you are not leaking fuel. We recommend taking it in and/or dealing with it right away.

Найдена следующая информация по ошибке P0456 для автомобиля NISSAN MURANO (2002-2007), Z50:

На русском языке:

Система улавливания паров топлива — крайне незначительная утечка

На английском языке:

Evaporative Emission System Leak Detected (very small leak)

Вы можете задать вопрос или поделиться опытом устранения ошибки P0456 на автомобиле NISSAN с другими пользователями.

Возможную причину возникновения и советы по устранению можно найти в каталоге причин и советов:

Найти причину   >>> 

Ошибки (коды ошибок) полученные от прибора, сканера требуют правильной интерпретации информации, дабы не тратить время и деньги на замену работающих элементов автомобиля.

Проблема зачастую кроется намного глубже чем кажется на первый взгляд. Это& вызвано теми обстоятельствами, что информационные сообщения содержат, как было выше сказано, косвенную информацию о нарушении работы системы.

Может быть полезным для решения вопроса по устранению неисправности у Nissan Murano (Z50):

Механическая неисправность, соединения шлангов, датчик давления системы улавливания паров топлива

Механическая неисправность, соединения шлангов, датчик давления системы улавливания паров топлива

What Does Nissan Murano Code P0456 Mean?

• Nissan Murano P0456 definition: Evaporative emission control system leak (small).
• Issue Severity: LOW – Continued driving for a short period of time is okay
• Repair Urgency: Get this fixed within the next month to prevent drivability problems and excessive fuel consumption.
• Diagnosis: It is unlikely the driver will notice any symptoms with check engine light code P0456 other than a slight odor of fuel, a slight decrease in fuel economy, and the check engine light. However, as with all check engine lights, it is recommended that you get it fixed as soon as possible so the engine can be running at the proper specifications to prevent further damage.

The EVAPorative emission control (EVAP) system prevents fuel vapors from escaping into the atmosphere. The fuel vapors from the fuel tank are absorbed and stored by charcoal pellets in the charcoal canister. The vent control valve is controlled by the engine control module (ECM) and allows air to flow into the charcoal canister to purge the gas vapors into the engine air intake to be burned. The flow of the gas vapors from the charcoal canister to the engine air intake is controlled by a purge volume control valve. The vent control valve is usually open when the engine is at normal operating temperature, and the purge volume control valve is commanded on when the ECM is ready to burn the built-up fuel vapors. However, when the Nissan Murano is turned off the ECM performs a leak test to ensure the EVAPorative emission control system is working properly. During the leak test, the ECM closes the vent control valve and purge valve to seal the EVAPorative system. If the EVAP system does not maintain the pressure, the ECM recognizes an EVAPorative emission control leak. In the case of P0456, it is a small leak, less than .020” in diameter.

Most Likely Repair And Cost For Nissan Murano P0456 By Year

The chart below shows the most likely repair and cost range for Muranos for all of the years that FIXD has data on.

Nissan Murano P0456 Causes

There are many potential causes of code P0456.

• Loose or damaged gas cap
• Leaking or disconnected EVAP hose
• Faulty purge volume control valve
• Faulty canister vent control valve
• Charcoal canister leak
• Leaking fuel tank
• P0456 is one of the top 5 trouble codes for the Nissan Murano.

Nissan Murano P0456 Symptoms

• Check Engine Light is on
• Decreased fuel economy
• Increased vehicle emissions
• Fuel smell

How Do I Fix Nissan Murano Code P0456?

With an EVAP fault, the first step is to get it diagnosed to figure out what is causing the problem.

If your Nissan Murano has this fault and you’re not comfortable diagnosing this issue at home, we recommend finding a RepairPal certified shop nearby to pinpoint the problem and give an accurate estimate for repairs.

These shops can not only help you figure out what’s going wrong before you waste time and money on the wrong parts, but they also offer a minimum 12-month, 12,000-mile warranty and stand behind all their estimates with guaranteed fair pricing.

> Find a RepairPal Certified Shop Near You

How Much Does It Cost to Fix Nissan Murano Code P0456?

P0456 can be caused by anything from a loose gas cap to a faulty valve to a leaking fuel tank. It’s impossible to give an accurate estimate without properly diagnosing the issue first.

If you take your car to a shop for diagnosis, most shops will start with an hour of “diag time” (the time spent in labor diagnosing your specific issue). Depending on the shop’s labor rate, this typically costs somewhere between $75-$150. Many, if not most, shops will apply this diagnosis fee to any required repairs if you have them perform the repairs for you. From there, a shop will be able to give you an accurate estimate for repairs to fix your P0456 code.

Possible Repair Costs for Nissan Murano P0456

For error code P0456, one or more of the below repairs may be needed to solve the underlying issue. For each possible repair, the estimated cost of repair includes the cost of the relevant parts and the cost of labor required to make the repair.

• Gas Cap $20-$60
• Evap Purge Volume Control Valve $150-$200
• Charcoal Canister Vent Control Valve $150-$200
• Replacement Evap Line $50-$100
• Charcoal Canister $200-$600

DIY Steps to Diagnose Nissan Murano Code P0456

Nissan Murano engine code P0456 could be caused by a number of things, including a loose gas cap, a faulty valve, or a leaking fuel tank. If you’d like to try to fix code P0456 at home without throwing money at parts, you’ll want to follow the steps below for proper diagnosis. Keep in mind this is an intermediate-level diagnosis and repair and not recommended for beginners. Diagnosis requires more specialized equipment beyond what the FIXD Sensor can provide and it can be a time and labor-intensive process for inexperienced DIYers.

DIY difficulty level: Intermediate

This repair requires mechanical knowledge and is not recommended for beginners.

Tools/parts needed (our top picks from Amazon):

• FIXD
• Fused power wire
• Ground wire

STEP 1: USE FIXD TO ENSURE NO OTHER ENGINE CODES ARE PRESENT

Scan your Nissan Murano to verify P0456 is the only code present. If other codes are present regarding fuel pressure or the fuel system, repair and diagnose those first. If it is paired with P0441, P0440, and/or P0446, there is most likely a solenoid failure, leaking charcoal canister, or a more complex EVAP leak.

STEP 2: CHECK YOUR GAS CAP

Inspect your Nissan Murano’s gas cap to see if it is loose or damaged. If your gas cap is loose, tighten it and clear the code. Inspect your gas cap for physical damage or deterioration. However, it should be noted that damage to the gas cap or deterioration of its components is not always noticeable. If your gas cap was not loose and you do not see any indications of failure, try replacing the gas cap anyway and clearing the codes. Gas caps are relatively inexpensive and are often the fix for code P0456.

STEP 3: CHECK HOSES

Check for cracked or disconnected EVAP hoses near or connected to the engine air box. Replace cracked/disconnected hoses. Clear the code.

STEP 4: CHECK FUEL TANK AND CHARCOAL CANISTER

Inspect the fuel tank and charcoal canister for damage and leaks. Replace if necessary.

STEP 5: CHECK PURGE VOLUME CONTROL VALVE

Check the purge volume control valve for proper operation. This valve is normally not powered on and when at rest, with no power source applied, does not allow air to pass through. It can get sticky, causing leaks.

The purge volume control valve is usually under the hood near the airbox or intake manifold. To test, remove the hoses from either side of the purge volume control valve with the key and engine off. Blow through openings with no power supplied. If you can’t blow through them, they are sealing properly and are most likely not the cause of this medium EVAP leak.

STEP 6: CHECK CHARCOAL CANISTER VENT CONTROL VALVE

Check the charcoal canister vent control valve for proper operation. This valve is normally not powered on and when at rest, with no power source applied, allows air to pass through. It can get sticky, causing leaks, or the internal solenoid can fail and not operate properly.

The charcoal canister vent control valve is usually connected to the charcoal canister underneath the vehicle. To test, remove the hoses from either side of the charcoal canister vent control valve with the key and engine off, unplug it from the Nissan Murano, and remove it from the vehicle. Blow through openings with no power supplied. Air should pass through. Now, supply a fused power source to one side and ground to the other of the electrical connector. Blow through the openings again. If you can’t blow through them, they are sealing properly and are most likely not the cause of this medium EVAP leak.

STEP 7: RUN A SMOKE TEST

The leak causing code P0456 is often too small to see. If you have completed all of the previous diagnostic steps, a smoke test may be necessary. You can purchase a smoke tester from Amazon to do it yourself, or you may want to take it to a shop to find the leak.

Common Nissan Murano P0456 Diagnosis Mistakes

Many assume that a loose fuel cap is the only problem and do not perform all the tests necessary to diagnose the full EVAP system. The P0456 leak is a bit trickier to diagnose. Also, Nissan Murano may have technical service bulletins regarding EVAP codes. Be sure to check if your particular year and model has any technical service bulletins available to save time diagnosing and/or misdiagnosing your Nissan Murano.

Still Need Help Fixing Nissan Murano Code P0456?

If you’ve followed the steps above and are still experiencing Nissan Murano check engine code P0456, please contact the FIXD Mechanic Hotline if you’re a FIXD Premium subscriber or find a RepairPal certified shop near you to get the right repairs at a fair price.

Fixed It But The Check Engine Light Is Still On?

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How to Reset Your Check Engine Light | 4 Ways To Clear It (With or Without a Scanner)