Modern automobiles are more and more equipped with new technologies, apart from the comfort of use it can provide, 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 Buick LaCrosse , this sensor also named oxygen sensor plays an necessary purpose. To find out, first, we are going to identify what a lambda probe is utilized for, then, what are the lambda sensor problems on Buick LaCrosse and how to resolve them.


What is a lambda role on Buick LaCrosse?

So we begin our content with the interest of a lambda sensor on Buick LaCrosse , we will first see what is the function of this probe and then how it functions.

Role of a lambda sensor on Buick LaCrosse

First designed by Volvo in the 1970s, it began to appear on our cars in the 1990s with the first EURO 1 emission specifications. Also called oxygen sensor on Buick LaCrosse , its task is to control the amount of oxygen in the exhaust gases, this will enable the engine to change the air/fuel mixture to decrease the pollution released by the car and reduce the car’s fuel consumption.

Lambda sensor operation on Buick LaCrosse

Before explaining you the different problems of lambda probe on Buick LaCrosse , we will look a little more in detail at its working to allow you to understand exactly how it functions and thus to consider more serenely the correction of a problem associated with it.
As we informed 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 determined upstream of the combustion but it is on the contrary measured at the engine outlet . With the EURO 1 standard there was only 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 precise data by compiling the two probes. These data are sent to the ECU which will adapt the quantity of air and gasoline injected into the engine to improve the combustion .

Lambda sensor problem on Buick LaCrosse

At last, we are now going to attack the part you are certainly most interested in this content, how to proceed if you have a lambda sensor problem on Buick LaCrosse . In a first step we will find out how to identify a lambda sensor HS and in a second step how to replace it.

How to know if a lambda sensor on Buick LaCrosse is HS

It is necessary to know that a lambda sensor has in general a lifetime of 150 000 km , this info can fluctuate according to the year of your Buick LaCrosse, your driving, and the good performance of your engine. A poorly maintained engine that emits unburned gases may forever damaged your lambda sensor. One of the clues that can notify you of a faulty lambda sensor on Buick LaCrosse may be the engine light turns on, if you want to turn off the engine light of your Buick LaCrosse, do not hesitate to consult our dedicated content to see the procedure to stick to. The only effective method to be certain that you have a lambda sensor problem on your Buick LaCrosse and to pass your car to the diagnostic case, for that do not hesitate to consult our tutorial which explains you Buick LaCrossehow to read the fault code of a Buick LaCrosse. Please note that if you have problems with one of your lambda sensors, the only remedy to solve them will be to replace the faulty sensor.

How to replace a lambda sensor on Buick LaCrosse?

And at last, we are going to concentrate on the correction of lambda sensor problems on Buick LaCrosse , by explaining how to replace a lambda sensor.

The replacement of a lambda sensor is quite basic to perform 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 quickly. To replace it, it will be necessary to put your Buick LaCrosse 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 Buick LaCrosse.

Whenever you have any additional questions about the Buick LaCrosse, do not hesitate to consult our Buick LaCrosse category.