Modern vehicles are progressively pre-loaded 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 released by our vehicles. This is precisely the subject of our article of the day, we are going to look at the problems of the lambda sensor on Subaru Impreza , this sensor as well called oxygen sensor plays an essential 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 Subaru Impreza and how to resolve them.
What is a lambda task on Subaru Impreza?
So we begin our article with the benefit of a lambda sensor on Subaru Impreza , we will first see what is the purpose of this probe and then how it works.
Role of a lambda sensor on Subaru Impreza
First designed by Volvo in the 1970s, it began to appear on our cars in the 1990s with the first EURO 1 emission standards. Also called oxygen sensor on Subaru Impreza , its task is to control the amount of oxygen in the exhaust gases, this will allow the engine unit to modify the air/fuel mixture to lower the pollution released by the motor vehicle and lower the car’s fuel consumption.
Lambda sensor operation on Subaru Impreza
Before explaining you the different problems of lambda probe on Subaru Impreza , we will look a little more in detail at its working to allow you to figure out precisely how it works and thus to consider more serenely the correction of a problem associated with it.
As we informed you, a lambda probe has the job 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 required 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 benefit 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 unit to improve the combustion .
Lambda sensor problem on Subaru Impreza
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At last, we are now going to attack the section you are obviously most enthusiastic about this article, what to do if you have a lambda sensor problem on Subaru Impreza . In a first step we will find out how to locate a lambda sensor HS and in a second step how to replace it.
How to know if a lambda sensor on Subaru Impreza is HS
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It is essential 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 Subaru Impreza, your driving, and the good performance of your engine unit. A poorly maintained engine unit that releases unburned gases may forever corrupt your lambda sensor. One of the clues that can alert you of a faulty lambda sensor on Subaru Impreza may be the engine unit light comes on, if you want to turn off the engine light of your Subaru Impreza, do not hesitate to seek advice from 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 Subaru Impreza and to pass your car to the diagnostic case, for that do not hesitate to consult our guide which explains you Subaru Imprezahow to read the fault code of a Subaru Impreza. Please note 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 Subaru Impreza?
And at last, we are going to concentrate on the correction of lambda sensor problems on Subaru Impreza , by describing how to replace a lambda sensor.
The replacement of a lambda sensor is quite simple to perform and you will be able to do it yourself with a minimal 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 quickly. To replace it, it will be necessary to put your Subaru Impreza 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 Subaru Impreza.
To find more tips on the Subaru Impreza, take a look at the Subaru Impreza category.
