The engine P0089 Code is important thing and if the real meaning of the engine is found, do not drive the car. You need to follow the right meaning of the code for solving the car engine. There are some reasons what may bring the car engine problem of the P0089 Code and you need to know those meanings. Those are Fuel pump output not meeting specifications, Clogged fuel filter or screen, Restricted fuel lines and Failed fuel pressure regulator. Those symptoms Vehicle may run poorly, Lean or rich conditions and Poor acceleration and lack of power. Try to fix the car with proper knowledge.