Code Enable Criteria
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 Saturn SW2, 2001 Saturn SL2, 2001 Saturn SL1, 2001 Saturn SL, and 2001 Saturn SC2. However, it is still accessible from the selected car via links, so may be relevant.
DTC sets when PCM cannot reduce spark knock (as seen by knock sensor) by retarding timing. Knock sensor activity is probably due to engine noise and not spark knock. This diagnostic is run with engine running and cylinder in combustion event window.