Fuel leakage, in the presence of an ignition source, could result in a fire.

Due to insufficient tightening of the fuel pressure sensor connected to an engine fuel delivery pipe with nickel phosphorus plating, there is a possibility that, over time, the pressure sensor could loosen. If loosening occurs, fuel could leak past a gasket used in the connection between the sensor and the pipe and through the threaded portion of the sensor.

What to do: Book this in with a dealer now. It affects a safety system.