Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
P2618
Crankshaft Position Signal Output Circuit =Short to Groundor Open & - For greater than 5 s
P2619
Crankshaft Position Signal Output Circuit =Short to Voltage & - For greater than 5 s