Test conditions

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2006 Volkswagen GTI, 2005 Volkswagen Jetta, 2005 Volkswagen GTI, 2004 Volkswagen Jetta, and 2004 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.

On Board Diagnostic (OBD) must have recognized a malfunction on one or both knock sensors, see DTC MEMORY, CHECKING AND ERASING (FUNCTIONS 02 AND 05) .
Coolant temperature must be at least 85 °C, see display group 28, display zone 3.