Conditions for Setting the DTC: P2A00
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 loop status parameter is open.
- The HO2S 1 voltage signal remains between 300-600 mV for more than 10 seconds.
- This diagnostic runs continuously.