Conditions for Setting the DTC
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects 4 CMP pulses occur more than 11 crank degrees before, or 11 crank degrees after nominal position for 24 out of 30 engine cycles.