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WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

General condition for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature must exceed -7°C.
Ignition of front catalyst: Engine running. Air mass flow has exceeded 5 g/s (aut 7 g/s) for an accumulate time of 120 sec. The air mass flow has exceeded 20 g/s for an accumulate time of 18 sec. No motor braking with fuel shut-off for more than 10 sec. No idling longer than 40 sec.

Assessment of catalytic converter: Longer than 200 sec. since start. Coolant temperature above 70 °C. Vehicle speed 40 -115 km/h. Accelerator pedal depressed. Engine speed 1270 -2540 RPM (auto. 1200-2100 RPM). Engine load 100-500 mg/c. Oxygen sensor 2 voltage changes corrected with respect to load and engine speed and accumulated for during approved voltage periods for oxygen sensor 1 *). When the voltage changes have been corrected and accumulated for 20 sec., their average value is calculated.

*: Accepted periods have 30-80 % pulse ratio (+trigger).