Notes: Ignition Knock (Detonation) Sensor. 2000, 2003-2004 Ford Expedition 4.6L V8. 1999-2004 Ford Expedition 5.4L V8. 1999 Ford Expedition 4.6L V8. 2001-2002 Ford Expedition 4.6L V8. The electronic component continuously monitors sensor output to ensure it responds with the appropriate frequency rate.
