Some Saab 9-3 owners report experiencing persistent error code P0089 even after replacing the fuel pressure regulator, suggesting possible issues with the fuel pump. This error code typically indicates that the Engine Control Module (ECM) has detected improper fuel pressure, which could be linked to common problems with the fuel pressure regulator that lead to performance issues such as sputtering, lack of power, and difficulty starting the vehicle. Additionally, symptoms like engine sputtering, stalling, or reduced fuel efficiency may point to potential fuel pump issues. It is crucial for owners to conduct a thorough examination of the fuel pump to diagnose any faults promptly, as neglecting this could result in further engine performance problems.
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