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Knock Sensor 2-Pin Bosch

The knock sensor uses a piezoelectric element to detect engine knock vibrations. The 2-pin connector carries the sensor signal and ground back to the ECU which retards ignition timing to prevent detonation.

// Specifications
Standard
Bosch knock sensor 2-pin
Pin Count
2
Type
Piezoelectric or resonant type
Output
AC voltage signal during knock events
Use Case
All modern engines with knock control
Frequency
5-20 kHz knock frequency range
// Pin Reference Table
Pin Name Function Type
1 Signal Piezo knock signal to ECU ADC
2 GND Shield and signal ground GND