Ignition Coil
WARNING: This page is about a different car, the 2002 Volvo V40 and 2001 Volvo V40. However, it is still accessible from the selected car via links, so may be relevant.
Connect an ohmmeter between the ignition coil terminals No. 1 and 2 (ignition coil side). The ohmmeter should read approximately .5 ohms. If not okay, replace ignition coil.