9 Common Questions About Your Vehicle’s Knock Sensor


The knock sensor detects and transmits to the ECU the high-frequency engine vibrations associated with knocking. The objective is to maximize energy yield by initiating ignition as soon as possible. Engines equipped with a knock sensor can significantly reduce fuel consumption while increasing torque.

The knock sensors location?

On the exterior of the engine block, the knock sensor is situated. It is designed to record knocking noise in all engine operating modes in order to avoid engine damage. The knock sensor “listens” for vibrations sent by the engine block’s construction and translates them to electrical voltage signals.

location of knock sensor

What happens if a knock sensor fails to function properly?

A faulty knock sensor may also prevent the engine from accelerating correctly on the highway, resulting in decreased fuel consumption. When the computer detects a malfunctioning knock sensor, your car will most likely lose power.

Can a faulty knock sensor cause engine damage?

In most situations, engine knocking can result in serious engine damage, necessitating an expensive repair or replacement, indicating that a defective knock sensor might cause engine damage.

What happens if I do not replace my knock sensor?

If the knock sensor is not functioning properly, the engine may begin pinging without the computer detecting it. If the knock sensor is found to be defective after testing, the engine may experience reduced power, decreased fuel mileage, and hesitations if it is not replaced.

What does a faulty knock sensor sound like?

If the knock sensor is not functioning properly, you will most certainly hear engine noises. You may hear strong thumping noises that gradually increase in volume. The noise is caused by gasoline and air spontaneously igniting inside the cylinder rather than reaching the point of combustion.

Is it difficult to change a knock sensor?

The knock sensor is a tremendous headache to replace. To access it, you must remove the air plenum, the intake manifold, the timing belt, and a variety of other components.

Is it possible to disable knock sensors?

Your knock sensor is an electrical device installed in your truck, car, or sport utility vehicle that detects engine knocks caused by the air-fuel mixture detonating prematurely as it enters the cylinder head. If you need to bypass your knock sensors at any point, the simplest method is to just unplug them.

How many knock sensors is an automobile equipped with?

How many knock sensors is an automobile equipped with? Typically, each bank of the engine will have one knock sensor (one on inline 4/5/6 cylinder engines, two on V6, V8, V10 engines).

10 OBD DTC Code Related to Knock Sensor Problem

  1. P0334 Knock Sensor 2 Circuit Intermittent (Bank 2)
  2. P0333 Knock Sensor 2 Circuit High Input (Bank 2)
  3. P0332 Knock Sensor 2 Circuit Low Input (Bank 2)
  4. P0331 Knock Sensor 2 Circuit Range/Performance (Bank 2)
  5. P0330 Knock Sensor 2 Circuit Malfunction (Bank 2)
  6. P0329 Knock Sensor 1 Circuit Intermittent (Bank 1 or Single Sensor)
  7. P0328 Knock Sensor 1 Circuit High Input (Bank I or Single Sensor)
  8. P0327 Knock Sensor 1 Circuit Low Input (Bank I or Single Sensor)
  9. P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)
  10. P0325 Knock Sensor 1 Circuit Malfunction (Bank I or Single Sensor)

This tutorial is humbly made by Erwin Salarda