Conditions For Setting DTC
WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
The PCM detects that the HO2S 1 rich-to-lean transition time takes longer than 219 milliseconds or the PCM detects that the HO2S 1 lean-to-rich transition time takes longer than 219 milliseconds.