Condition 1
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects the internal HO2S signal voltage is between 1.48-1.52 volts while the desired lambda is above or below a threshold.
- The above condition exists for more than 4 seconds.