DTC P0171, DTC P0172, DTC P0174 Or DTC P0175: Fuel Injection System Function: Notes
WARNING: This page is about a different car, the 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Before performing diagnostic procedure, follow testing procedure. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM. DTC P0174 and DTC P0175 apply to 3.5L.