Conditions for Setting the DTC
WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
P2618
The ECM detects a short to ground in the dedicated crankshaft position sensor signal circuit to the audio amplifier.
P2619
The ECM detects a short to voltage in the dedicated crankshaft position sensor signal circuit to the audio amplifier.