How to read Audi fault codes

If the warning light such as Check Engine, ABS, Airbag, TPMS are coming ON in your Audi, a Diagnostic Trouble Code (DTC) gets stored in one or more control unit. The first step in troubleshooting the problem is retrieving the fault code. In this guide, we will take a look at how you can read and clear Audi fault codes using various OBD-II scanners.

Knowing which scanner to use to read Audi fault codes may be the most difficult part. Level 1 OBD2 scanners can only be used to retrieve fault codes from your Audi Engine Control Unit (ECU). Those are faults that trigger the Check Engine warning light on the dashboard. To diagnose ABS and Airbag/SRS warning lights you will need a Level 2 OBD-2 scanner. If you don't have an Audi scanner, take a minute to read the article on Best Audi/VW OBD-II scanner. The procedure for reading Audi fault codes is similar regardless of which scanner you are using.

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What you will need 

Audi OBD-II/CAN Scanner

How to read Audi fault codes

Step 1

Park your Audi on a level surface and set the parking brakes.

How to read Audi fault codes

 

Step 2

Open the driver's door and locate the OBD-2 port.

 

Step 3

Plug your scanner into the OBD2 port

Plug scanner into Audi port for diy troubleshooting

 

Step 4

Turn on the ignition by turning the key to position II. If your Audi has START/STOP feature press the button without pressing the brake pedal.

Turn ON Audi ignition to read and clear codes with a scanner

 

Step 5

Allow your scanner to turn on. Follow the promptings on your scanner to read fault codes.

Diagnose Audi Check Engine Light

Read check engine light from the ECU by going to OBD-II menu, then Read Codes. 

Watch this video to learn how to use a Level 1 OBD 2 scanner to read and clear Audi Check Engine Light codes.

Diagnose Audi Anti-lock Brake System

Watch this video to learn how to use a Level 2 OBD 2 scanner to retrieve Audi Anti-lock Brake System codes.

  1. Plug scanner into OBD-II port. 
  2. Turn on igntion. 
  3. Turn on scanner. 
  4. Select Audi model. 
  5. Select control unit ABS. 
  6. Select Read Codes

Diagnose Audi Airbag Warning Light

Watch this video to learn how to use a Level 2 OBD-II scanner to troubleshoot Audi Airbag Light on.

  1. Plug in scanner into the OBD-II port. 
  2. Turn on igntion. 
  3. Turn on scanner. 
  4. Select your Audi model from the menu. 
  5. Select SRS/Airbag control unit. 
  6. Select Read Fault Codes from the menu. 
Vehicle

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