Camshaft timing control, checking
WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, and 2003 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
The intake camshaft is adjusted according to load and engine speed. The solenoid camshaft adjustment valve causes oil pressure to be applied to the camshaft adjuster (mechanical adjustment device).
NOTE:
- The camshaft timing control only becomes active 25 seconds after the engine is started.