Why would my Peugeot 406 diesel is stuck in reverse?

If your Peugeot 406 diesel is stuck in reverse, it could be due to a few reasons. Common issues include a problem with the gear linkage, such as a misaligned or damaged cable, or a fault in the transmission itself, such as worn synchronizers. Additionally, low Transmission Fluid levels or contamination could also lead to shifting issues. It's advisable to have the vehicle inspected by a mechanic to diagnose and resolve the problem accurately.