General Information

Engine Control
P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1) - General Information

Component Location





General Description

Knocking is a phenomenon characterized by undesirable vibration and noise that can cause engine damage. A knock sensor (KS) is mounted on the cylinder block and senses engine knocking. A knocking vibration from the cylinder block is applied as pressure to the piezoelectric element. A knock sensor (KS) detects vibration when RPM rises or drops and generates voltages based on this vibration. The ECM controls the ignition timing based on the amplitude and frequency of the knock sensor signal. For example, if engine knocking occurs, the ignition timing is retarded to prevent it.

DTC Description

If the number of knock sensor errors is less than the lower limit or the upper limit, ECM sets P0326.

DTC Detecting Condition





Diagnostic Circuit Diagram