Detection Condition
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0325 indicates knock sensor malfunction.
DTC P0326 indicates knock sensor has detected vibrations (voltage generated is based on this vibration) relative with engine speed that is outside a calibrated level.