Latest automobiles are more and more built with new technologies, apart from the comfort of use it can bring, technology as well has the advantage of saving fuel or reducing the pollution emitted by our automobiles. This is precisely the subject matter of our article content of the day, we are going to look at the problems of the lambda sensor on Audi Q7 , this sensor as well called oxygen sensor plays an necessary function. To find out, first, we are going to identify what a lambda probe is utilized for, then, what are the lambda sensor problems on Audi Q7 and how to fix them.
What is a lambda task on Audi Q7?
So we start our content with the interest of a lambda sensor on Audi Q7 , we will first see what is the task of this probe and then how it functions.
Role of a lambda sensor on Audi Q7
First produced by Volvo in the 1970s, it began to show up on our cars in the 1990s with the first EURO 1 emission specifications. Also called oxygen sensor on Audi Q7 , its mission is to regulate the amount of oxygen in the exhaust gases, this will enable the engine to change the air/fuel mixture to decrease the pollution emitted by the motor vehicle and reduce the car’s fuel consumption.
Lambda sensor operation on Audi Q7
Before describing you the different problems of lambda probe on Audi Q7 , we will look a little more in outline at its operation to allow you to discover exactly how it functions and thus to consider more serenely the correction of a problem related to it.
As we explained to you, a lambda probe has the task of managing the amount of oxygen present in the exhaust gases . One could naively presume 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 interest is to have more exact 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 improve the combustion .
Lambda sensor problem on Audi Q7
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Finally, we are now going to attack the section you are certainly most keen on this content, what to do if you have a lambda sensor problem on Audi Q7 . In a first step we will see how to locate a lambda sensor HS and in a second step how to replace it.
How to know if a lambda sensor on Audi Q7 is HS
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It is necessary to know that a lambda sensor has in general a lifetime of 150 000 km , this statistics can vary according to the year of your Audi Q7, your driving, and the good performance of your engine. A poorly looked after engine that emits unburned gases may completely corrupt your lambda sensor. One of the clues that can warn you of a faulty lambda sensor on Audi Q7 might be the engine light comes on, if you want to turn off the engine light of your Audi Q7, do not think twice to visit our dedicated content to see the procedure to follow. The only effective way to be sure that you have a lambda sensor problem on your Audi Q7 and to complete your car to the diagnostic case, for that do not think twice to consult our tutorial which explains you Audi Q7how to read the fault code of a Audi Q7. 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 Audi Q7?
And finally, we are going to focus on the correction of lambda sensor problems on Audi Q7 , by explaining how to replace a lambda sensor.
The replacement of a lambda sensor is quite basic to perform and you will have the ability to do it yourself with a minimum of tools and mechanical expertise. 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 necessary to put your Audi Q7 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 Q7.
If you wish more guides on the Audi Q7, go to our Audi Q7 category.
