KNOCK SENSOR LOW INPUT

  • Tiny
  • chevyman54173
  • 1999 Chevrolet Silverado
  • V8
  • 4WD
  • automatic
  • 168,000 miles

I have a 1999 chevy silverado with a 5.3 motor. I was getting codes for system too lean bank one and bank two. I replaced my intake gaskets and since I had the intake off I also replaced both knock sensors. So far I have no system too lean codes. But now I have codes for the knock sensors. Codes are po327 and po332. Knock sensor bank one and bank two circuit low input. Could there be a chance that both new sensors are bad? Are the sensors maybe not torqued enough? Or is the wiring bad? I was told to replace the wiring cause the wires are exposed to heating and cooling and the metal in the wires broke when I moved them. Any info would help.

Friday, March 4th, 2011 AT 4:38 PM

3 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Are the knock sensors OEM or after market? After market sensors might cause the problem indicated as they could be diffrent in rating. I would say you need to check the wiring again. Chances are there is a problem there. If you had broken wires, you may want to consider just replacing them rather than a repair.

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Friday, March 4th, 2011 AT 5:30 PM
  • Tiny
  • chevyman54173
  • Member

Yes they are after market sensors. BWD is the brand name. What do you mean by different rating? ANy more info would be very helpfull.

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Friday, March 4th, 2011 AT 6:27 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

After checking through our database, possible causes for the trouble codes could be triggerred by loose or overtorqued KS.

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Saturday, March 5th, 2011 AT 3:20 PM

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