FixVault

DTC Descriptor

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
DTC P1AC6

Drive Motor 1 Control Module Crankshaft Position (CKP) Sensor Circuit

DTC P1AC7

Drive Motor 1 Control Module Crankshaft Position Sensor Performance