Definition
Persistent knock indicates overly aggressive timing, lean mixtures, or low octane.
Performance tunes balance timing advance against knock margin.
Automotive Wiki
Electronics
Knock Sensor
A sensor detecting engine knock (detonation) so the ECU can retard timing.
Related terms
- ECUEngine control unit — the computer managing fuel, ignition, and emissions parame…
- OBD-IIOn-board diagnostics standard providing standardized trouble codes and sensor da…
- MAP SensorManifold absolute pressure sensor reporting boost or vacuum to the ECU.
- MAF SensorMass airflow sensor measuring incoming air mass for fuel delivery calculations.
- CAN BusController area network — the digital communication backbone linking vehicle mod…
- Wideband O2 SensorA high-accuracy oxygen sensor reporting precise air-fuel ratio for tuning.
Category: Electronics · Updated August 31, 2026