P0324 - KNOCK CONTROL SYSTEM ERROR

The knock control system consists of the Knock Sensor, its connector, the wiring, and the PCM. The sensor is a device that is screwed directly into the engine block. Although the location may vary depending on the manufacturer, it is located on the sides of the block and in the coolant lines. For this reason, be careful when removing this sensor.

The Knock Sensor has a piezoelectric crystal inside. When it shakes or perceives vibrations produces an amount of voltage. Since the control circuit is a single wire to ground, the PCM (Powertrain Control Module) recognizes the voltage generated by the vibration as a detonation or ping of the engine. The level of voltage produced is highly dependent on the vibration level of the sensor crystal.

The Knock Sensor usually produces a small amount of voltage when the engine is running. This is because it is inevitable that the engine causes vibration, and as a result, amounts of sensor voltages. If the PCM detects an unexpected or out-of-range signal from the Knock Sensor, it will set the P0324 OBDII fault code.

• Check Engine light ON.
• Loss of engine performance.
• Problems during acceleration.
• Higher fuel consumption.

Reasons to set the P0324 OBD2 diagnostic code:

• The fuel may be contaminated.
• The Detonation Sensor control circuit may have bad wires or connectors.
• The detonation sensor may be faulty.
• The engine may have internal faults.

To solve the DTC P0324 OBDII code, try this:

• Consult the TSB (Technical Service Bulletins).
• Check all the cables or connectors related to the system. Look for burns, wear, or corrosion on these components. Repair or replace as required. Then, clear the code.
• If the code returns, start the engine and use a DVOM to check that the Knock Sensor signal is within the manufacturer's specifications. If there is an out-of-range voltage at the sensor connector, replace it.