Code Enable Criteria

WARNING: This page is about a different car, the 2001 Saturn LW200, 2001 Saturn L200, and 2001 Saturn L100. 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 10-40 percent.
No CKP, ECT, EVAP, fuel injector, knock, MAP, misfire, O2S1, PCM internal fault, TP or P0502 DTCs are set.

DTC sets when O2S1 voltage is not consistently fluctuating outside 300-600 millivolt for more than 5 seconds.