Knock Sensor Control
WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.
Possible cause of malfunction if knock control (ignition angle retardation, injection quantity limit) is activated.
| Possible cause | Corrective action | |
|---|---|---|
| Poor fuel quality | Change fuel quality (→ operating instructions) | |
| Knock sensor tightened to incorrect torque | Loosen knock sensors and tighten to 20 Nm | |
| Knock sensor faulty | Check knock sensor → Knock Sensors, Checking . | |
| Corrosion at harness connector | ||
| Engine components loose | Secure engine components | |
| Engine damage | Check compression pressure | |
| Engine components loose | Secure engine components | |