On Board Diagnostics (OBD) General Information

WARNING: This page is about a different car, the 2015 Audi RS 5, 2014 Audi RS 5, and 2013 Audi RS 5. However, it is still accessible from the selected car via links, so may be relevant.

The Engine Control Module (ECM) is equipped with OBD.
The Diagnostic Trouble Code (DTC) memory should be checked before every repair or every fault finding session.
Check the vacuum hoses and connections.
Fuel hoses in engine compartment must only be secured with spring-type clips. The use of clamp or screw type clips is not permissible.
For the electric components to work properly, a voltage of at least 11.5 Volts is required.
Do not use sealants containing silicone. Particles of silicone drawn into the engine, will not be burnt in the engine and damage the oxygen sensor.
The vehicles have a crash fuel shut-off. This function reduces the risk of fire in during a collision because the fuel pump relay switches the ECM off.