2000 Subaru Impreza Outback Q&A

2000 Subaru Impreza Outback Question: P0171 how do i fix?

My car is pulling a po171 code. I know it means the car is running to lean but dont know how to solve this. any help? -
Answer 1
Understanding the background behind a lean code is the key to the repair. Essentially the computer can no longer compesate for a improper fuel mixture. The lean code can be set by a number of different components. The most common is a vacuum leak at a hose,gasket or even an oil cap that is not sealed properly. The other items would be a leak in the air intake system between the air cleaner and engine.Lastly a faulty sensor such as the Mass Air Flow sesnor or Oxygen Sensor. -