Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
P0171
The limit to correct a lean air/fuel ratio has been exceeded. - After the running conditions are met - For greater than 3 min
P0172
The limit to correct a rich air/fuel ratio has been exceeded. - After the running conditions are met - For greater than 3 min