Conditions For Setting This DTC Are As Follows:

Average O2S 1 response times are greater than 249 milliseconds for rich to lean or lean to rich sweeps.
Engine speed is 1600-2600 RPM.
TP sensor angle is 8-20 percent.
Ratio of response times is greater than 3.5 or less than .4.
Purge learned memory is greater than 191.
Evaporative emission control system is commanded open for greater than 60 percent Pulse Width Modulated (PWM).