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P0326 Code: Knock Sensor 1 Circuit Range / Performance Bank 1Diagnostic trouble code (DTC) P0326 stands for “Knock Sensor 1 Circuit Range/Performance Bank 1.” It is set once the powertrain control module (PCM) determines that the signal from the knock sensor has fallen outside of the specified range. It may also be logged if the PCM fails to detect a Bad Knock Sensor: Common Symptoms and Testing ProcedureThe knock sensor uses an internal piezoelectric element to detect abnormal combustion, known as spark knock, inside of the engine. Spark knock (detonation) is an undesirable phenomenon that creates an abnormal increase in cylinder pressure, often resulting in a metallic pinging noise from the engine.
The knock sensor detects abnormal combustion,