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Knock sensors

Tiny
SCOTTDANNY22
  • MEMBER
  • 2002 CHEVROLET SUBURBAN
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 360,000 MILES
Okay, check engine light turned on. Went and had the code pulled, it said one of my knock sensors were bad. I took the knock sensor harness apart where it plugged together and tested each wire going to the sensors. Both tested 108 on the ohm setting on my meter. Is that what it is supposed to read?
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Friday, February 22nd, 2019 AT 9:43 AM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
What was the actual code number? The knock sensor puts out an ac signal. The ohms spec for sensor itself, shows, 90K---110K ohms. If you want to check continuity for wire circuits, take it loose at both ends then test. As far as ohms test, the closer you get to zero, the better.
Check out the repair guides link at top of page, has some info on knock sensors and wire testing.
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Friday, February 22nd, 2019 AT 12:02 PM

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