Nissan murano clogged catalytic converter

Nissan murano clogged catalytic converter DEFAULT

A catalytic converter is a vital part of modern cars, as it purifies your vehicle’s exhaust gases and thus suits modern pollution requirements. However, it is possible that it may turned out to be clogged or malfunction, in which case a change or cleaning is important. In this article we are going to look at how to clean a catalytic converter on Nissan Murano? To achieve this, first of all, we will describe the scenarios in which it may be interesting to clean the catalytic converter of your Nissan Murano, then, how to execute this cleaning to recover the performance of the catalytic converter of your car.


Why would you want to clean up the catalytic converter of your Nissan Murano?

In this first section we will show you why it may be important to clean the catalyst of your Nissan Murano . In fact for some of you it may seem obvious but the majority of you do not know how it works and the outcomes dirty catalytic converter .

Purpose and functioning of the catalytic converter of a Nissan Murano

The catalytic converter of your Nissan Murano has the function to eliminate harmful exhaust gases associated with the procedure of your engine. In fact, it is one of the main elements that fight against the pollution discharged by your Nissan Murano. It will transform these harmful gases into water or non-polluting gases. In order to transform these gases, the catalyst of your Nissan Murano a mesh of precious metals which, when the gases pass at high temperature, will break them down by chemical reaction . A catalytic converter can just work from 400°, it is therefore important to avoid clogging the catalytic converter of your Nissan Murano. If you are thinking of making adequately long travels to heat it up repeatedly (count more than 10 kilometres for the catalyst to reach the right temperature), this will allow you to optimise the life of this element and preserve best engine overall performance.

Consequences of a dirty or faulty catalytic converter on Nissan Murano

We will now see what can be the outcomes of a dirty or failing catalytic converter on Nissan Murano . This will allow you to detect the manifestations that should warn you to a malfunction of your catalytic converter, here is the list of symptoms of a faulty catalytic converter:

  • The catalytic converter of your Nissan Murano is clogged: As we explained above, if you make too short travels like 50% of people, it will not have the time to start functioning and the catalytic converter will clog up with exhaust gases.
  • Switching on the engine light: : Following a clogged catalytic converter, engine light of your Nissan Murano may come on, do not think twice to seek advice from our article to identify how to switch it off.
  • A faulty lambda sensor : The catalyst works in close connection with the lambda sensors downstream and upstream of it, they will analyze the air flowing inside it, if it is clogged the sensors will more often than not as well have complications.
  • A metallic noise originating from the exhaust: In the event the catalyst is dead you should hear this noise which suggests that that the ceramic is damaged.

Why you should clean the catalytic converter of your Nissan Murano

Before we end with the step you are most likely most enthusiastic about, how to clean the catalytic converter of a Nissan Murano? We will show you why it may be important for you to carry out this cleaning. In fact, a catalytic converter is a very expensive part (about 500 euros with the set up, the price can fluctuate depending to the engines). Furthermore to being no longer good for passing the technical control , you may be at risk of over-consumption of fuel . At last, the last interest is that cleaning a catalytic converter is not that expensive and doing it repeatedly will save you quite a lot of money.

How do you clean the catalytic converter from its Nissan Murano?

Finally here is the stage that you are most likely most enthusiastic about in this article content, how to clean the catalytic converter of your Nissan Murano? Know that this process is very very easy, and that there are two approaches to do it:

  • Scrubbing the catalytic converter from your Nissan Murano on a regular basis: This technique is specifically useful for people who mainly do short trips . To do this, nothing could be easier, from time to time, make a long trip (about 30 minutes to improve the efficiency of the process), thinking of making your engine go up in revs so that the temperature in the catalyst increases and it can be cleaned.
  • To use a catalyst cleaner: You can find some in a car center for about 20 euros. All you have to do is add it to your fuel directly in your tank with about half a full tank. Afterwards you will have to drive on a long distance for at least 1 hour at mid-range by trying to go repeatedly at high rpm . If you can before and later on do an exhaust gas analysis to examine that you have recovered healthier exhaust fumes after the procedure. You can carry out this procedure every 15 000km.


If you need more guides on the Nissan Murano, go to our Nissan Murano category.


Your Nissan Murano leaves the factory with a catalytic converter.  It can run into problems over the normal life of the vehicle, and is often accompanied by OBDII code P0420.  Below we’ll cover the location, price, and symptoms of a bad torque converter in your Murano.



Catalytic Converter Price

Murano Catalytic Converter Location

Nissan Murano Bad Catalytic Converter Symptoms

Bad Catalytic Converter Symptoms Nissan Murano


What is a Catalytic Converter Anyway?

The catalytic converter, which is often mispronounced and spelled “cadillac converter”, is the most important part of your Muranos emissions system.  It takes the emissions gases that are a bi product of the normal combustion process and reduces them down to levels that meet federal emissions regulations.

The catalytic converter uses a catalyst to burn off residual fuel vapor and turn it them into:

  • Water
  • Carbon dioxide
  • Heat, lots of heat

Catalytic converter’s have been common in all domestic automobiles for nearly 40 years.  They have gotten better at what they do from an exhaust flow perspective, and an exhaust cleansing perspective.


Where is the Murano’s Catalytic Converter Located?

The exact location of the catalytic converter is going to depend on the model year and engine size of your Nissan Murano.  But, they are not that difficult to locate.  The catalytic converter itself is a part of the exhaust system.  Tracing it, you’ll find it somewhere between the tail pipe and intake manifolds.

They almost always have a heat shield around them and an oxygen sensor somewhere before them.  It is necessary for the catalytic converter to be before the muffler.  The muffler is really the only thing that you can confuse for the catalytic converter on your Nissan Murano.

The catalytic converter may be bolted or welded on depending on the year and make of the vehicle.


Catalytic Converter Price:  Nissan Murano

Nissan Murano Catalytic Converter Price

The catalytic converter for your Muranos cost will vary by model year and engine size.  But, as a rule catalytic converters are not cheap.  They are one of the most stolen items on a vehicle there is.  They are almost always more than $100, and can cost several hundred dollars for a large on that sits behind a V8.

Since it often requires welding to replace the catalytic converter, it’ll often mean a trip to the exhaust shop.  Later model vehicles can cost over $1000, when it’s all said and done.

Catalytic converters also have a have a scrap value of up to $250, with the average being closer to $90.  Here’s the source on that, if you’d like to check the going rates in the scrap market.


Nissan Murano:  Bad Catalytic Converter Symptoms

It is not uncommon for the catalytic converter to fail, as the years and mileage take their toll.  They will fail faster if there is an issue with misfiring or a bad air/fuel mixture.

When your Murano has a major engine problem, the check engine light will begin flashing.  In most cases, this flashing condition occurs to help try and save the catalytic converter.

Most of the symptoms of a bad catalytic converter have to do with the lack of exhaust flow through the Cat.  Once it gets so clogged, your Murano will be barely drivable.

Here are the most common signs of a bad catalytic converter in a Nissan Murano:

  • MPG Suffers–  As the exhaust flow begins to slow, your gas mileage will as well.
  • Service Engine Soon Light–  Any vehicle made in the last 20 years is going to have an onboard OBDII computer.  It’ll give you the “trouble code” that you’d need to diagnose and repair your Murano’s emissions system.
  • Failure to Start–  Once the catalytic converter is so clogged, there won’t be enough air flow for your Murano to start.
  • Darker Exhaust Smoke
  • Rotten Egg Smell
  • No Throttle Response at Speed–  If your Murano feels like it just won’t go any faster than a certain speed without feeling like it is out of power, that’s a very typical sign that a catalytic converter is failing.

Here’s a pretty good video from Scotty Kilmer on this subject:



If you are having problems with your Murano’s catalytic converter, it is often accompanied by P0420.  It can be an expensive repair.  If you feel like there is anything that you can add to the discussion, please leave a comment below.  Good luck fixing your issue!

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Symptoms that a catalytic converter is needs to be replaced

Additional note on Jack Dak87’s suggestion to pull the upstream oxygen sensor - it is going to be REALLY loud when you start the car with that sensor hole empty. Do not do this at 6 AM if you have neighbors within a quarter mile.

If you have a single exhaust pipe (or one dedicated exhaust per converter) you can check for an obstruction in your exhaust by putting your hand at the exhaust opening with the car idling. You should be able to feel the individual bursts of exhaust. If the flow is smooth, there is an obstruction.

We still have no theories about the cause of the thumping, other than it may be related to the engine running rough.

At 149k miles, they will absolutely replace both oxygen sensors if they replace the cat. You have nothing to loose by replacing them first to see if that corrects the problem.

If the cat has failed, there is likely some additional problem with fuel or ignition. Make sure that is corrected if you invest in a new cat.

Top 5 Problems Nissan Murano SUV 1st Generation 2003-07

Nissan Murano Catalytic Converter Failure Symptoms & Solutions

If your Nissan Murano isn’t running quite right, it may be a problem with the catalytic converter. This issue can cause your SUV to have more harmful emissions, degraded performance and noisy exhaust. Fortunately, if you can troubleshoot the problem, you can fix it. Before you head to the auto parts store, however, read on to learn the symptoms and solutions for catalytic converter failure.

Signs Your Catalytic Converter Has Failed

Catalytic converters fail sometimes. They are finely-balanced exhaust components that rely on rare, reactive metals to convert harmful emissions into air, water and carbon dioxide. Additionally, they have a lifespan of about 100,000 miles. This may vary a little depending on maintenance and the quality of the part.

The main indicator of a failed catalytic converter is a check engine light and diagnostic trouble code. Of course, you may need to troubleshoot the problem even if you don’t have a code scanner handy. Additionally, there are a few problems that may not set a code properly. In short, it is good to know the symptoms of a failed cat.

  • The vehicle struggles to start.
  • The engine misfires.
  • The engine doesn’t produce much power even when accelerating hard.
  • The vehicle fails an emissions test.
  • There is a strange noise and/or smell coming from the exhaust.
  • The vehicle’s fuel efficiency drops.

These signs may indicate a failed catalytic converter. It is worth noting, however, that other problems can cause them as well. Examine the cat for any physical damage and scan your codes if you notice these symptoms.

Fixing a Failed Catalytic Converter

To fix a completely failed catalytic converter, you will need to replace it. Use a VIN number scanner at your favorite auto parts store to find the right parts for your model and year of Nissan Murano.

Changing your catalytic converter is something you can do in your own garage with some tools and jack stands. However, it involves an O2 sensor. So, if you aren’t confident, consider picking up one of the best Nissan Murano catalytic converters and bringing it to a trusted mechanic for installation.

The problem may also be a clogged cat. This can be fixed in some cases. One strategy you should try is an “Italian tune-up.” Pretend you’re a Ferrari mechanic and drive your vehicle hard for a few miles. This will heat up the cat and help unclog it.

You can also try manually cleaning it. However, this can cause damage if you do it improperly. So, it may be worth simply replacing the catalytic converter. Another option is to use a fuel additive designed for cleaning out the exhaust and cat.

Get Started

Working on your vehicle is fun and rewarding. You’ll feel great when you get your Nissan Murano back on the road having fixed an issue with it. While a catalytic converter replacement may be a little challenging for beginners, there are plenty of other maintenance tasks anyone can do. For example, you can change your oil or brake pads. Start wrenching on your vehicle today and see what you can achieve.


Murano converter catalytic nissan clogged

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