Bad knock sensor module?

2018 CHEVROLET MALIBU HYBRID
98,500 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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VANNAK
  • MEMBER
  • 1 POST
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?
Sep 6, 2023 at 9:46 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,236 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
Sep 7, 2023 at 7:12 AM
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