Engine - Buzzing and Rattling In Park and Neutral

Engine Buzzes or Rattles in Park or Neutral

Got a '04-05 TSX with an engine that buzzes or rattles when you rev it with the shift lever in Park or Neutral? You might just be hearing the normal harmonic resonance from the oil pump and the balancer shaft assembly.

This harmonic resonance is most noticeable between 2,000 and 3,000 rpm and it's just a normal characteristic of the vehicle. It's not something you can fix by replacing engine parts.