Conditions For Running DTC

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0101, P0102, P0103, P0341, P0342, or P0343 are not set.
The camshaft position (CMP) sensor signal is transitioning.
The Mass Air Flow (MAF) is more than 3 g/s in the crank mode.
The MAF is more than 5 g/s in the running mode.