What does it mean when a 2001 Volvo s80 won't go into gear?

If a 2001 Volvo S80 won't go into gear, it could indicate several potential issues. Common causes include low Transmission Fluid levels, a faulty clutch (for manual transmissions), or problems with the transmission itself. Electrical issues, such as a malfunctioning neutral safety switch or faulty sensors, may also prevent the vehicle from shifting. It's advisable to have the vehicle inspected by a professional mechanic to diagnose and address the problem accurately.