DTC C1540: Solenoid valves - Open Circuit: Conditions
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.
- If there is no current supplied to three or more of the valves.
- If the control module's internal voltage relay is defective.
- No power supply (+30 circuit) to the control module (pins 17 and 18).