P0326 and P0331
WARNING: This page is about a different car, the 2010 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 up to 6 s.