Conditions for Running the DTC

WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle speed is greater than 8 km/h (5 mph).
The engine speed is less than 7,000 RPM.
The engine load is less than 60 percent.
Engine misfire is detected and DTC P0300 sets with the MIL illuminated.
DTCs P1380 and P1381 run continuously when the above conditions are met.