Conditions For Running DTC

WARNING: This page is about a different car, the 2002 GMC Sierra and 2002 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0200, P0300, P0401, P0404, P0405, P0440, P0442, P0446, P0452, P0453, P1404, or P1441 are not set.
The HO2S voltage is between 425-475 mV at engine start up.
The Intake Air Temperature (IAT) sensor and the Engine Coolant Temperature (ECT) sensor are less than 122°F (50°C), and are within 14°F (8°C) of each other at engine start-up.
The ignition 1 signal is between 9-18 volts.
Intrusive tests are not in progress.
Scan tool output controls are not active.