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