Ignition System General Information

WARNING: This page is about a different car, the 2010 Audi A5, 2009 Audi A5, and 2008 Audi A5. However, it is still accessible from the selected car via links, so may be relevant.

The engine control module is equipped with On Board Diagnostics (OBD).
For the electric components to work properly, a voltage of at least 11.5 Volts is required.
It is possible that the control module will recognize a malfunction and store a DTC during some tests. After completing all checks and repairs, check the DTC memory and erase the memory, if necessary.
If the engine only starts briefly and then turns off again after troubleshooting, repair or checking of the components, it may be that the immobilizer is blocking the Engine Control Module. DTC memory must then be checked and if necessary, control module must be adapted.