Idle Speed & Mixture

WARNING: This page is about a different car, the 2001 Audi TT, 2001 Audi S8, 2001 Audi S4, 2001 Audi A8, and 2001 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Idle speed and mixture (CO content) cannot be adjusted. Idle speed is controlled by the Throttle Valve Control Module (TVCM). Mixture is adjusted by oxygen sensor control. Both idle speed and mixture control are monitored and adjusted by ECM.