What is P0324 fault code and what does it mean? What is the Knock Control System Error? How do you fix the P0324 fault code What are the symptoms and causes for the P0324 fault code
What is the P0324 Fault code? What does it all mean?
If the powertrain controller module (PCM), detects a problem in the knock sensor circuit, it will set a malfunction code P0324 to illuminate the check engine lamp.
The air-fuel mixture, ignition timing and engine speed determine the most efficient power generation. To calculate the fuel delivery and ignition timing, the PCM monitors several sensors. A few degrees before the piston hits top dead center (TDC), is the best time to ignite the air/fuel mixture. Most engines produce the most compression pressure when it reaches 14°. The entire air-fuel mixture takes hundreds of milliseconds to ignite. This means that ignition must happen before the piston hits top dead center. (up to 30° for an idling engine, up to 45° for a running engine)
“Knock” This is caused when the spark plug contacts a hot spot inside the cylinder rather than the spark plug. This is also known as pre-ignition. Two ignitions are created in the cylinder as a result. One is initiated early by the hot spot, the other by the spark plug. Both flame fronts collide, creating a rise in cylinder pressure as well as a metallic ringing sound. Knocking can cause everything from a minor ringing sound to total destruction of cylinder seals and pistons, rings, connecting rods and bearings.
The knock control system’s job is to detect and report any misfires or knocks in the cylinders to the PCM using a voltage signal. The system includes a component called a “knock sensor” You can detect certain frequencies that are produced by knocks within the engine. Knock sensors attach to the engine block. The location of the sensor can vary from manufacturer to manufacturer. It is typically located on the sides of an engine block, near the freeze plugs, or below the intake manifold. To detect engine vibrations, some can be mounted on the head of the cylinder. Each engine bank usually has a knock sensor. Modern vehicles have a knock sensor for every cylinder.
The piezoelectric sensor crystal is the main component of the knock-sensor. The piezoelectric crystal produces a very small amount of voltage when shaken or vibrated. The level of voltage generated depends on the amount of vibration that is encountered in the knock sensor. A small amount of vibration is normal, no matter how smooth your engine runs. If the PCM detects a voltage signal from the knock sensor that indicates engine knock, it may delay the ignition timing to prevent engine damage (For example, 25° TON instead of 28° TON). If the knock is severe, a fault code will not normally be recorded. If the voltage signal from a sensor is too strong and the engine knock is severe, the PCM can cut off fuel supply and ignition to the affected cylinder. This will record a fault code.
There are many vehicles that can be affected by the P0324 fault code, including models from Chevrolet and Opel, Fiat. GMC, Mini. Dodge. Ford. Volkswagen.
What is the P0324 Fault Code?
Below are some reasons to set fault code P0324:
- – Defective knock sensor(s)
- – Knock sensor harness can be left open or shortened
- – Problems with electrical connection to the knock sensor circuit. (Lose connectors, wires damaged).
- – Mechanical issues with internal engines
- – Issues with the ignition system
- – Unstable operating conditions (such as vacuum leaks and clogged injectors).
- – Fuel that is poor quality, dirtiest or has a low octane rating
- – Engines that overheat due to faulty thermostat, oil burning or EGR leak.
- Vehicles that are subjected too much to heavy duty (such as stop-and go traffic for many years) can create carbon deposits in the pistons. This can lead to hot spots and engine knock.
- – An ECM/PCM/ECU error
What are the symptoms for P0324 fault code?
You may experience the following symptoms if your vehicle has the code P0324:
- – Illumination for the check engine light
- – Increased fuel use
- Low engine performance
- – Engine hesitation during acceleration
- – Idle speed irregularity
- – The engine makes loud ringing noises
Note: Even if you have set the code, you might not feel any symptoms. There is a safety mode on some vehicles. This mode prevents engine damage and is activated by PCM. You can safely drive the vehicle into the nearest repair shop.
How do I fix the P0324 fault code?
You should first address any other codes associated with P0324. These repairs can resolve the P0324 error code.
- – Repair or replacement corroded connectors and cables
- Repairing bad electrical connections in the knock sensor circuit
- – Test the knock sensor, and replace it if it’s defective
- – Reprogramming and replacing the PCM
How Serious Is the P0324 Fault Coding?
The engine’s knock control system is an essential component. It is vital that it functions properly. A faulty knock sensor could cause permanent damage to the engine and lead to expensive repairs.
