Skip to main content
0
My Account
0 Shopping Cart $0.00
Menu
Wishlist Account

KNOCK SENSOR

67 Products Found
The knock sensor is located on the outside of the engine block. It is intended to record knocking noise in all engine operating states in order to prevent engine damage.

An engine knock sensor, also known as a detonation sensor, is a component in modern internal combustion engines designed to detect abnormal combustion, often referred to as "knocking" or "pinging." Knocking occurs when the air-fuel mixture in the engine's cylinders ignites prematurely or unevenly, causing a knocking noise and potentially damaging the engine over time.

How It Works:

Detection: The knock sensor is typically mounted on the engine block or cylinder head. It uses a piezoelectric element to detect vibrations caused by knocking. Signal Transmission: When knocking is detected, the sensor sends an electrical signal to the engine control unit (ECU). Adjustment: The ECU then adjusts the engine's timing, such as retarding the ignition timing or altering the air-fuel mixture, to prevent further knocking and protect the engine.

Importance:

  • Engine Protection: Prevents damage caused by knocking, such as piston or cylinder wall damage.
  • Performance Optimization: Helps maintain optimal engine performance and fuel efficiency.
  • Emissions Control: Reduces harmful emissions by ensuring proper combustion.

Symptoms of a Faulty Knock Sensor:

  • Check Engine Light (CEL) illuminated.
  • Poor engine performance or reduced fuel efficiency.
  • Audible knocking or pinging noises from the engine.
  • Engine hesitation or misfiring.

Replacement: If the knock sensor fails, it should be replaced promptly to avoid potential engine damage. Replacement typically involves:

  • Locating the sensor (usually on the engine block or cylinder head).
  • Disconnecting the electrical connector.
  • Removing the sensor (often requiring a socket or wrench).
  • Installing the new sensor and reconnecting the electrical connector.

A functioning knock sensor is crucial for maintaining engine health and performance. If you suspect an issue, it’s best to diagnose and address it quickly.