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Bad knock sensor module?

Tiny
VANNAK
  • MEMBER
  • 2018 CHEVROLET MALIBU HYBRID
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 98,500 MILES
Noise when the engine starts and no sound after, during drive. When on the stop sign and start up speed I got noise soon and lose.
This is a bad knock sensor module or?
Thursday, September 7th, 2023 AT 4:46 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

The knock sensor is designed to adjust ignition timing (fine-tune) under different conditions. When there is an issue, the sound is usually described as a valve ping. Is that what you are experiencing? Is the check engine light on and a stored code present related to the sensor?

Let me know. Also, here is a link you may find of interest:

https://www.2carpros.com/articles/how-a-knock-sensor-works

Also, if it is loud enough for you to record, please do so and upload it for me to hear.

Let me know.

Take care,

Joe
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Thursday, September 7th, 2023 AT 2:12 PM

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