DTC P1136: O2S Heater Circuit. Current too High, Sensor 1.: Notes
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.
Fig 1: Circuit Diagram - O2S Heater Circuit. Current Too High (Sensor 1)