Recent automobiles are more and more furnished with new technologies, apart from the comfort of use it can bring, technology also has the advantage of saving fuel or reducing the pollution released by our automobiles. This is exactly the subject matter of our article content of the day, we are going to look at the problems of the lambda sensor on Mazda CX 7 , this sensor also named oxygen sensor plays an necessary function. To find out, first, we are going to identify what a lambda probe is employed for, then, what are the lambda sensor problems on Mazda CX 7 and how to fix them.

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What is a lambda task on Mazda CX 7?

So we start our article with the benefit of a lambda sensor on Mazda CX 7 , we will first see what is the job of this probe and then how it functions.

Role of a lambda sensor on Mazda CX 7

First developed by Volvo in the 1970s, it began to show up on our cars in the 1990s with the first EURO 1 emission specifications. As well called oxygen sensor on Mazda CX 7 , its objective is to regulate the amount of oxygen in the exhaust gases, this will enable the engine to modify the air/fuel mixture to decrease the pollution released by the car and reduce the car’s fuel consumption.

Lambda sensor procedure on Mazda CX 7

Before describing you the different problems of lambda probe on Mazda CX 7 , we will look a little more in detail at its functioning to allow you to understand precisely how it functions and thus to consider more serenely the correction of a problem related to it.
As we informed you, a lambda probe has the job of managing the amount of oxygen present in the exhaust gases . One could naively think that this data is calculated upstream of the combustion but it is on the contrary measured at the engine outlet . With the EURO 1 standard there was just one lambda sensor needed before the catalyst, but with the arrival of more drastic specifications there are now 2 lambda sensors, one before and one after the catalyst . The benefit is to have more precise data by compiling the two probes. These data are sent to the ECU which will modify the quantity of air and gasoline inserted into the engine to optimize the combustion .

Lambda sensor problem on Mazda CX 7

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At last, we are now going to attack the part you are undoubtedly most keen on this article, what to do if you have a lambda sensor problem on Mazda CX 7 . In a first step we will discover how to find a lambda sensor HS and in a second step how to replace it.

How to know if a lambda sensor on Mazda CX 7 is HS

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It is necessary to know that a lambda sensor has generally speaking a lifetime of 150 000 km , this data can differ according to the year of your Mazda CX 7, your driving, and the good performance of your engine. A poorly maintained engine that releases unburned gases may permanently corrupt your lambda sensor. One of the clues that can warn you of a faulty lambda sensor on Mazda CX 7 might be the engine light turns on, if you want to turn off the engine light of your Mazda CX 7, do not hesitate to visit our dedicated article to see the process to follow. The only effective method to be certain that you have a lambda sensor problem on your Mazda CX 7 and to complete your car to the diagnostic case, for that do not hesitate to consult our tutorial which explains you Mazda CX 7how to read the fault code of a Mazda CX 7. Please be aware that if you have problems with one of your lambda sensors, the just remedy to correct them will be to replace the faulty sensor.

How to replace a lambda sensor on Mazda CX 7?

And at last, we are going to concentrate on the correction of lambda sensor problems on Mazda CX 7 , by detailing how to replace a lambda sensor.

The replacement of a lambda sensor is quite basic to accomplish and you will be able to do it yourself with a minimum of tools and mechanical knowledge. A lambda sensor is worth between 25 and 50€ , it is better to replace the 2 lambda sensors present upstream and downstream of your catalytic converter because if one of them is faulty the second one risks to drop you fairly quickly. To replace it, it will be required to put your Mazda CX 7 on candles and at the level of your catalyst unscrew your probes, disconnect them, reconnect them and screw the new ones . Once re-connected, you should not have any more problems with your lambda sensor on Mazda CX 7.

To find more tips on the Mazda CX 7, take a look at the Mazda CX 7 category.