DTC Parameters

WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Engine run time is more than 60 seconds.
Engine speed is 1300-3000 RPM.
TP angle is 3-35 percent.
ECT is more than 158°F (70°C).
Fuel level is more than 10 percent.
Evaporative purge is commanded to 80 percent or greater.
System in closed-loop mode.
No CKP, ECT, EVAP, fuel injector, fuel tank pressure, fuel trim, IAT, idle speed, MAP, misfire, ECM internal fault, or TP DTCs are set.

DTC sets if HO2S1 rich-to-lean or lean-to-rich transitions are outside a calibrated range within 60 second test period.