Question

I got the P0325 code on a 2004 Saab 9-3 Linear 2.0L T. Ionization module?

Answer 1

P0325 Knock detection circuit, no activity

There is no knock sensor and there is no camshaft sensor it uses the discharge module. with the ionization module (740) The ignition coil and the CDM are used to detect any knocking. This is the ionization detection module (740)

Before you do anything inspect the sparkplugs if they need to be replaced, replace them with the correct type.