Error Code 12111
WARNING: This page is about a different car, the 1990 Saab 9000 and 1990 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.
- The check engine light is off. There is a problem with oxygen sensor self-compensating circuit (air-fuel ratio is incorrect while driving).
- Check for air fuel leaks. Check oxygen sensor pre-heater circuit and sensor output. Check ELCD system. Check fuel pressures.