Code Enable Criteria

WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

Engine run time is more than 160 seconds.
Engine speed is 1100-3000 RPM.
Engine Coolant Temperature (ECT) sensor is more than 135°F (57°C).
Mass Airflow (MAF) sensor is 15-55 grams/second.
The loop status is Closed.
Throttle Position (TP) sensor is more than 5 percent.
Fuel tank level remaining is more than 10 percent.
Ignition 1 signal voltage is 9-18 volts.
Scan tool output controls are not active.
Intrusive tests are not in progress.
DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0131, P0132, P0134, P0135, P0151, P0152, P0154, P0155, P0300, P0351, P0401, P0404, P0405, P0440, P0442, P0446, P0452, P0453, P1258, P1404, or P1441 are not set.
Conditions are met for 100 seconds.

DTC sets when HO2S lean-to-rich and rich-to-lean switches are less than a calibrated value.