Conditions For Running DTC

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0101, P0102, P0103, P0121, P0122, P0123, P0335, P0336, or P0742 are not set.
The vehicle speed is more than 10 MPH.
The engine load is less than 60 percent.
The engine misfire is detected and DTC P0300 set.
The engine speed is less than 3200 RPM.