Conditions for Setting the DTC: P2270
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 02 sensor cannot achieve voltage equal to or more than 725 mV.
AND
- The PCM detects that the accumulated mass air flow monitored during the Stuck Lean Voltage Test is more than 500 grams.
- This diagnostic runs once per trip.