Conditions For Setting DTC

WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

The average O2S 1 response times are more than 1119 milliseconds for rich-to-lean sweeps, or 760 milliseconds for lean-to-rich sweeps, or sum of the rich-to-lean and lean-to-rich is greater than 1235 milliseconds.
The average O2S 1 L/R sweep is more than 971 milliseconds for A/T or 1111 milliseconds for M/T or the average R/L added to the average L/R sweep is more than 971 milliseconds for A/T or 1111 milliseconds for M/T.