The fuel pressure sensor is part of the evaporative emissions system (EVAP) and reads pressure in the fuel system to detect evaporative leaks, such as loose or faulty gas caps. When a fuel pressure sensor fails it may upset the air fuel ratio and cause the vehicle to experience performance issues such as a decrease in power, acceleration, and fuel efficiency. Some things that can cause a fuel pressure sensor to fail are a weak fuel pump, clogged filter or screen, or a restricted fuel supply line. Walker fuel pressure sensors are designed and manufactured to OEM Standards on OEM production lines using patented technology and the finest materials.