Conditions for Setting the DTC: P2271
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- The PCM detects that the O2 sensor cannot achieve voltage equal to or less than 150 mV.
AND
- The PCM detects that the accumulated mass air flow monitored during the Stuck Rich Voltage Test is more than 400 grams.
- This diagnostic runs once per trip.