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 running at least 140 seconds.
Engine speed 1200-3410 RPM.
ECT more than 149°F (65°C).
TP angle 15-50 percent.
No CKP, ECT, EVAP, fuel injector, knock, MAP, misfire, HO2S1, ECM internal fault, TP or P0502 DTCs are set.

DTC sets when HO2S1 voltage is not consistently fluctuating outside 300-600 millivolt for more than 5 seconds.