Ignition discharge module: Diagnostics: Misfiring

WARNING: This page is about a different car, the 2003 Saab 9-3 and 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Emission-related misfiring will generate diagnostic trouble code P0300-P0304.
If catalyst damaging misfiring occurs, diagnostic trouble code P1300-P1304 will be generated. CHECK ENGINE will flash during the misfiring.
If catalyst damaging misfiring occurs in conjunction with a fuel level below 4 liters, diagnostic trouble code P1390-P1394 will be generated. CHECK ENGINE will flash during the misfiring.