Recent cars are more and more pre-loaded 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 cars. This is precisely the subject of our content page of the day, we are going to look at the problems of the lambda sensor on Audi A4 , this sensor also named oxygen sensor plays an important purpose. To find out, first, we are going to find out what a lambda probe is utilized for, then, what are the lambda sensor problems on Audi A4 and how to solve them.
What is a lambda role on Audi A4?
So we begin our content page with the interest of a lambda sensor on Audi A4 , we will first discover what is the function of this probe and then how it functions.
Role of a lambda sensor on Audi A4
First developed by Volvo in the 1970s, it began to show up on our cars in the 1990s with the first EURO 1 emission standards. Also called oxygen sensor on Audi A4 , its goal is to control the amount of oxygen in the exhaust gases, this will allow the engine to adapt the air/fuel mixture to decrease the pollution released by the car and reduce the car’s fuel consumption.
Lambda sensor procedure on Audi A4
Before describing you the different problems of lambda probe on Audi A4 , we will look a little more in detail at its working to allow you to figure out exactly how it functions and thus to consider more serenely the correction of a problem associated with it.
As we explained to you, a lambda probe has the task of controlling the amount of oxygen present in the exhaust gases . One could naively believe that this data is measured 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 standards there are now 2 lambda sensors, one before and one after the catalyst . The interest is to have more precise data by compiling the two probes. These data are sent to the ECU which will adapt the quantity of air and gasoline inserted into the engine to optimize the combustion .
Lambda sensor problem on Audi A4
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Finally, we are now going to attack the section you are absolutely most interested in this content page, how to proceed if you have a lambda sensor problem on Audi A4 . In a first step we will discover how to identify a lambda sensor HS and in a second step how to replace it.
How to know if a lambda sensor on Audi A4 is HS
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It is important to know that a lambda sensor has generally speaking a lifetime of 150 000 km , this statistics can vary according to the year of your Audi A4, your driving, and the good performance of your engine. A poorly maintained engine that releases unburned gases may completely alter your lambda sensor. One of the clues that can notify you of a defective lambda sensor on Audi A4 might be the engine light comes on, if you want to turn off the engine light of your Audi A4, do not hesitate to visit our dedicated content page to discover the process to follow. The only effective way to ensure that you have a lambda sensor problem on your Audi A4 and to pass your car to the diagnostic case, for that do not hesitate to consult our tutorial which explains you Audi A4how to read the fault code of a Audi A4. Please be aware that if you have problems with one of your lambda sensors, the just solution to solve them will be to replace the defective sensor.
How to replace a lambda sensor on Audi A4?
And at last, we are going to focus on the correction of lambda sensor problems on Audi A4 , by detailing how to replace a lambda sensor.
The replacement of a lambda sensor is quite simple to carry out and you will be able to do it yourself with a minimal 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 defective the second one risks to drop you fairly quickly. To replace it, it will be required to put your Audi A4 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 Audi A4.
To discover more tips on the Audi A4, take a look at the Audi A4 category.
