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.

Loop status is closed.
Engine run time is more than 160 seconds.
Engine speed is 1100-3000 RPM.
Engine Coolant Temperature (ECT) is more than 135°F (57°C).
Mass Airflow (MAF) sensor is 15-55 grams/second.
Throttle Position (TP) sensor is more than 5 percent.
Ignition 1 signal is 9-18 volts.
Fuel tank level remaining is more than 10 percent.
Intrusive tests are not in progress.
Scan tool output controls are not active.
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 transition time ratio is not within a calibrated range.