Conditions For Setting DTC

WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. 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 mS for rich-to-lean sweeps or 760 mS for lean-to-rich sweeps.
The sum of rich-to-lean and lean-to-rich is more than 1235 mS.