The knock sensor detects the detonation vibrations and sends a voltage signal to PCM. But if the knock sensor is out of order, it will lead to unusual sounds, poor acceleration and low fuel mileage. You may also get poor engine performance. See this slideshow to be able to quickly determine the failed knock sensor in your car.

1. How to
Determine the
Failed Knock
Sensor in your
Car

2. Engine detonation occurs in
the internal combustion
process when:
• Gasoline in the cylinder explodes
• Changes in the ignition timing

3. Detonation is generally referred
to as engine knocking.

4. Knock sensor is responsible
for the following functions:
• Detect the detonation vibrations
• Send voltage signal to PCM

5. Sensor prevents the engine
damage through pre-ignition
process.

6. If knock sensor is damaged,
following signs you will notice
in a car.

7. Unusual
Sounds

8. Failed knock sensor can cause
loud noise from the engine.

9. Noise occurs due to the ignition
of air and fuel mixture inside
the cylinder.

10. Poor
Acceleration

11. Failed knock sensor prevents
the acceleration from being
effective.

12. So, when you step on the gas
pedal to accelerate, it doesn't
accelerate first.

13. Low Fuel
Mileage

14. Fewer miles per gallon are
mostly occurring due to a failed
knock sensor.

15. When you notice the low fuel
mileage on the car, then check
the knock sensor.

16. Illuminated
Engine
Warning
Light

17. Illuminated engine warning
light on the dashboard
indicates failed knock sensor.

18. Ignoring the warning light for
too long may devastate the
engine effects.

19. Depressed
Engine
Performance

20. When the engine starts to drag
and jerk around, check the
knock sensor.

21. Failed knock sensor also
produces a burning smell from
the engine.

22. Conclusion

23. When you will notice these
signs, replace the knock sensor.

24. Consult with a reputed
mechanic for inspection and
replacement.

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