LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volvo >> 1998 >> S70 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Ignition System >> Ignition Timing Control >> Knock Sensor
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Knock Sensor

Models have 2 knock sensors. Knock sensors are fitted to cylinder block to sense detonation inside cylinders. When detonation is detected, ECM retards ignition timing in each cylinder individually until knocking stops.