Fixed Knock Sensor Code PO332 PO327!! It's The Resistance.

Chevy Knock Sensor Codes PO332 PO327
2001 Chevy 2500HD 6.0L

[FinallyMe]

I have been chasing the same problem. Instead of buying a bunch of sensors to get the right one, I might try adjusting the resistance to get it in the right range. Thanks for the video.

[GGungar]

I have been dealing with this same problem for the last 6 months I the last too I have bought bad have been from the Chevy garage thank you for this videoi am gunna try this

[artpatronforever]

If the issue is only the default sensor resistance, it may be possible to adjust that
resistance value with an adjustable dual potentiometer circuit inserted into the
knock sensor lead. A pair of 10 turn Bourns 3006 trimpots could be used with
a 20K trimpot (Bourns 203) in series with the sensor lead and another 1 M
trimpot (Bourns 105) from the computer side of the 20K trimpot to ground.
The computer would see a resistance value adjustable to a precise value it
accepts as normal, calibrated by watching an ohm meter attached to the
computer side at the junction point of those 2 trimmers. The sensor is
likely to still function normally to detect any actual engine knock, even
though its untriggered resistance is slightly out of range if unadjusted
and uncalibrated by a compensation circuit. Trimpots allow adjusting
untriggered resistance so the computer is not overly sensitive to the
sensor untriggered resistance. When a sensor detects an actual knock
the resistance change will be many times greater than any small value
change done to calibrate the untriggered resistance. This "gadget"
type of circuit could delay or eliminate need for replacing a sensor
that otherwise still works fine to detect an actual knock, but is only
slightly out of range for the expected resistance seen by an overly
sensitive computer that wants a new sensor it does not actually
require to continue working, only because the system was designed
to avoid any user calibration and sell more new sensors to replace
old sensors that would still be in service for years if calibration
adjustments were an included feature. Go figure why that would
be done that way. Selling expensive repair parts is big business.

[cashvato]

Great info, I will look for 99K ohms. Hope that helps, I have been struggling for 1 year on this as well. Too bad a GM engineer does not address this to the public... Frustrating!!!
Thanks

[Angelam-metk]

thank u very much im getting tonitcright now much appreciated .

[mikewhite]

Never use narrow screen recording. Always turn phone 90 degrees and get the right format.

[dogdue]

I believe there are 4 grounds in the engine compartment. Take them off and clean them.

[dougshuckra]

THANK YOU for this!! Is the truck still showing no codes? Have an 03 with the same problem. I remember the resistance on the sensors was around 103k.

[Amador-up]

What happened if i put a resistance of 1000 ohm resistant a cross in the tap ofthe wires

[gilbertguzman]

I put the original knock sensor harness now theres no codes showing

[rm]

Did he perhaps include where he got those specific resistance 99k knock sensors?

[Angelam-metk]

my knock send green wire is barely tied no tape nothing, also other knocksen wire dark blue ? cars been driving about 6 months the way so do I put both together blue and green wires and solder them together fonnectirfor blue had 2 wires but other was cut and taped how would you connect them I'm not getting a code I'm just trying to fix my corroded wires that I found, ? thank you appreciate some true advice Lol I don't want it to get a bigger problem ty

[robjenstreet]

I’m having the same problem on my 2012 jeep. Replaced knock sensors and wiring harness and still comes on. And they all are in the same horrible place. I’ve redone it twice now and can’t figure it out.

[callapygian]

Did you find threaded holes to attach them tobthe exterior of the block?

[kingcharlesproductions]

Did you keep the knock sensors in under the intake or did you remove them And just found new locations?

[dogdue]

Seal them with red rtv after installing.

[mikemitchell]

Is there a way to make these engines run without a knock sensor at all.

[tchapman]

You can put the knock sensor anywhere?

[onellsr]

Can’t you just put a 100k resistor on each wire then ground the other lead of the resistor.(heat shrink it) Get rid of the sensor completely!

So did you add 2 knock sensors. Is that whats going on ?