Detection Condition
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0171 indicates adaptive fuel control air/fuel ratio is too lean (right bank).
DTC P0174 indicates adaptive fuel control air/fuel ratio is too lean (left bank).