Conditions For Running DTC

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

The ignition is ON.
DTCs P0112, P0113, P0117, P0118, P0125, P0128, P0601, P0602, P0604, P0606, P1481, P1482, P1484, P1621, or P1683 are not set.
The vehicle has a minimum soak time of 8 hours.
The Intake Air Temperature (IAT) is more than 59°F (15°C).