What does fault code p1091 mean on your Saab 9-5?

Fault code P1091 on a Saab 9-5 indicates a problem with the fuel pressure regulator or the fuel pressure sensor. This code typically suggests that the fuel pressure is lower than the expected range, which can lead to performance issues like poor acceleration or stalling. It may also point to issues with the fuel pump or fuel delivery system. Diagnosing and addressing the underlying cause is essential to restore proper engine function.