Conditions for Setting the DTC: P0326

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The KS signal indicates an excessive engine knock is present.
The ECM commanded spark retard at a given engine load and speed is more than the calibrated value.
The above conditions exist for 6 seconds.