Think about yourself driving peacefully on board your Audi A4 and suddenly an engine signal appears on your dashboard ! The typically seen response is the worry of risking a major problem. To know what accurately this light corresponds to, you will have to learn how to read an Audi A4 fault codes, you may have previously heard about OBD system, this is exactly what we are going to focus on. Our editors have chosen to publish this content to enable you fairly quickly find the source of this default code and to give you serenity. To perform this, we will first look at the nature of a fault code on Audi A4, then how to read an Audi A4 fault code, and finally how to erase this fault code to be able to turn off the light on your dashboard.

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What is a Audi A4 fault code?

A fault code is a generic or standard code common to all manufacturers , they are also called DTC (Data Trouble Code), the goal is to ensure that any diagnostic OBD can translate them. They will be represented by a standard format, like for example: P0255. Each info will have a special explanation. Default codes are codes issued by the calculators of your Audi A4. These ECUs will constantly monitor your vehicle’s exhausts, pressures, mixtures and when the values exceed the limits set by the vehicle’s ECU, the fault code will show up. The benefit of knowing how to read a fault code on your Audi A4 is that you will have gain access to to specific statistics about your automobile which will allow you to figure out what concern you are facing.

How to read a fault code on my Audi A4?

In this second part we will now focus precisely on what brings you on this website, how to read a fault code on Audi A4. To gain access to this precious info you will need to to buy a diagnostic tool, also referred to as OBD 2, named after the socket on your Audi A4 to which you will have to connect. These diagnostic tools are freely available in the market, you will be able to find some in Bluetooth version which connects to your phone and some standard versions with a reader associated to the socket, as far as price is concerned, you will be able to find models between 30 and 100 euros. Once you have acquired an OBD2 diagnostic reader, you will need to find the diagnostic plug on your Audi A4, it is found on the left side of your steering column on the lower part of your dashboard, behind a hatch. It is easy to locate because it is triangular shaped and has 16 pins. All you have to do is connect with your diagnostic tool to read the fault code of your Audi A4.

How to erase the fault code Audi A4

Finally, to finish this content, we are going to describe you the manipulation to execute to erase a fault code on your Audi A4. Once you have navigated through the menus, you will access the list of active fault codes on your car. But, you will have to ask yourself an important question, is it really beneficial to erase this fault code on Audi A4? Absolutely, erasing a fault code without dealing with the problem is like closing its eyes to the fact. In addition, the computer of your Audi A4 is made to take decisions depending to the data it collects, if a very important fault code is present, it will likely modify the engine performance to preserve it. So if you delete the fault code, be sure you solve the problem to which it is connected. Some OBD diagnostic tools do not allow you to do this. You have a dedicated navigation menu on most diagnostic tools that should allow you to clear this fault code on Audi A4.

If you wish more tutorials on the Audi A4, go to our Audi A4 category.