Buy OEM 1997 Volvo Part # 31491865. Ignition Knock (Detonation) Sensor. Knock Sensor A failed Knock Sensor will often have no noticeable symptoms beyond a check engine light

Control System, Ignition.
Ignition Knock (Detonation) Sensor.

KNOCK SENSOR

Knock Sensor
A failed Knock Sensor will often have no noticeable symptoms beyond a check engine light or engine ping or knock, but it does cause your 1997 Volvo to operate inefficiently and produce higher emissions. Our technicians have access to manufacturer-approved repair processes and Volvo genuine parts.