Conditions For Setting DTC
WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- The PCM detects that the HO2S 1 voltage failed to switch from rich-to-lean within a 90 second monitoring period.
- The PCM detects that the HO2S 1 voltage failed to switch from lean-to-rich within a 90 second monitoring period.