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 409 seconds.
Loop status is closed.
Ignition 1 signal is 9-18 volts.
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, P0300, P0351, P0401, P0404, P0405, P0440, P0442, P0446, P0452, P0453, P1258, P1404, or P1441 are not set.

DTC sets when HO2S signal voltage is steady between 400-475 millivolts for 150 seconds and Throttle Position (TP) changes more than 5 percent within one second, 6 times.