Knock sensor location I need to replace them

Tiny
DWHITTON
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
A troubleshooting engine light code indicates that the nox sensors are shorted. Where are these nox sensors located, how many sensors are required and what is the procedure for replacing these nox sensors? Thanks
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Wednesday, September 23rd, 2009 AT 8:47 PM

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Tiny
2CEXPT
  • MEMBER
You got 2 of them that's under the intake manifold-the intake manifold here is how the job is done in the diagrams below it will show the location of the sensor as well. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, September 23rd, 2009 AT 9:38 PM
Tiny
MSJ200283
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • 266,000 MILES
Had a code for ok nock sensor replaced both of them cleared code out and it
Came back on. The problems I having is hesitation and fuel
Milliage and also sounds like it ain't shiffting at the right rps for over drive it gose
To 80. Only thing I have done is put a child ait intake and throttle
Body spacer I don't have any any smells or noise
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Wednesday, May 5th, 2021 AT 2:12 PM (Merged)
Tiny
MSJ200283
  • MEMBER
P0332 and its a 5.3 flex fuel think If I change oil like a different grade and fuel grade
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Wednesday, May 5th, 2021 AT 2:12 PM (Merged)
Tiny
HMAC300
  • EXPERT
IMPORTANT:
If an engine knock can be heard, repair the engine mechanical condition before proceeding with this diagnostic.

Observe the Freeze Frame/Failure Records for this DTC.
Turn OFF the ignition for 30 seconds.
Start the engine.
Operate the engine within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?-Go to Step 3 Go to Diagnostic Aids
3Turn OFF the ignition.
Remove the intake manifold sight shield. Refer to Engine Sight Shield Replacement (4.8L, 5.3L, and 6.0L (RPO LQ4)) or Engine Sight Shield Replacement (6.0L (RPO LQ9)).
Disconnect the knock sensor (KS) inline harness connector.
Measure the resistance from the signal circuit of the affected KS to a good ground with a DMM.
Is the resistance of the KS within the specified range?
IMPORTANT:
Do not tap on any plastic engine components.

Set the DMM to the 400 mV AC hertz scale.
Measure the AC voltage from the signal circuit of the affected KS to a good ground with a DMM.
Tap on the engine block near the affected KS while observing the DMM.
Does the voltage change on the DMM while tapping on the engine block near the KS?-Go to Step 5 Go to Step 10
5Test the affected KS signal circuit between the powertrain control module (PCM) and the KS inline harness connector for the following conditions:
An open or a high resistance
A short to voltage
A short to ground

Refer to Circuit Testing and Wiring Repairs.
Did you find and correct the condition?-Go to Step 12 Go to Step 8
6Remove the intake manifold. Refer to Intake Manifold Replacement.
Test the affected signal circuit between the KS inline harness connector and the affected KS connector for an open, high resistance or short to ground. Refer to Circuit Testing and Wiring Repairs.
Did you find and correct the condition?
Other than this you should stop right here as it could be a pcm problem or connection its' the #2 knock sensor that is setting this code.
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Wednesday, May 5th, 2021 AT 2:12 PM (Merged)
Tiny
LORI SWANGER
  • MEMBER
  • 2004 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 152,000 MILES
Hello. I hooked my Obd2 up to my truck, because of my engine light coming on. It gave me a code P332 knock sensor faulty. Could you tell me how much it will cost me to get this fixed by a mechanic?
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Wednesday, May 5th, 2021 AT 2:13 PM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Good morning,

I attached the parts and labor time for you if it is the sensor that is bad. There are 2 sensors and are replaced together. With labor rates in my area, the labor is around $400.00 plus the part listed.

Diagnostics need to be done to verify it is the sensor. Codes rarely identify bad parts, just failed systems.

I attached the flow chart for the code. These items need to be checked to verify the failure.

https://www.2carpros.com/articles/how-to-check-wiring

Roy

DTC P0332

CIRCUIT DESCRIPTION
The knock sensor (KS) system enables the power-train control module (PCM) to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation. The system uses two KS located under the intake manifold. KS 1 is located at the front of the engine. KS 2 is located at the back of the engine. Each KS produces an AC voltage that varies depending on the vibration level during engine operation. The PCM adjusts the spark timing based on the amplitude and frequency of the KS signal. The PCM receives a signal from each KS through a signal circuit. The KS ground is supplied by the engine block through the sensor housing. The PCM uses each KS signal to calculate an average voltage range value. If the KS system is operating normally, the PCM should monitor the KS voltage varying above and below the voltage range. If the PCM detects the KS signal voltage within the voltage range, or the KS signal is not present, a DTC will set. DTC P0327 refers to the front KS. DTC P0332 refers to the rear KS.

CONDITIONS FOR RUNNING THE DTC
DTCs P0117, P0118, or P0125 are not set.
The minimum noise level must be learned. The minimum noise level is learned when the following conditions are met:
The engine coolant temperature (ECT) must be greater than 60 C (140 F).
The engine speed is between 475-975 RPM for 10 seconds.
The engine speed is between 1,500-3,000 RPM.
The manifold absolute pressure (Map) is less than 49 kPa.
The engine coolant temperature (ECT) is more than 60 C (140 F).
The throttle angle is more than 0 percent.
The engine run time is more than 10 seconds.
The ignition voltage is more than 10 volts.

CONDITIONS FOR SETTING THE DTC
The PCM detects that the KS signal is within the calculated voltage range or the KS signal is not present.
The above conditions are met for more than 9 seconds.

ACTION TAKEN WHEN THE DTC SETS
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
If DTCs P0327 and P0332 are set at the same time, inspect for poor connections at the KS harness jumper, located at the left rear side of the intake manifold.
Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set. The KS should be free of thread sealant. The KS mounting surface should be free of burrs, casting flash, and foreign material.
For an intermittent condition, refer to Intermittent Conditions. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Intermittent Conditions

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Wednesday, May 5th, 2021 AT 2:13 PM (Merged)
Tiny
LORI SWANGER
  • MEMBER
Thanks so much Roy, for the information. It's a great help.
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Wednesday, May 5th, 2021 AT 2:13 PM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
You are welcome.

Always glad to help.

Roy
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Wednesday, May 5th, 2021 AT 2:13 PM (Merged)
Tiny
MALZONE GRIGGS`
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 126,000 MILES
Engine lite comes on from my knock sensors, the truck doesn, t ping or knock but I know I need to get them fix is there a deadline on this. Money is very very short I just erace the code everymorning I drive it.
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Wednesday, May 5th, 2021 AT 2:13 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
This is a tech bulliten on your code:
AUDIBLE SPARK KNOCK (DETONATION), MIL ILLUMINATED, DTC P0332 SET (REPLACE REAR BANK KNOCK SENSOR & RTV AREA AROUND SENSOR) TECHNICAL SERVICE BULLETIN Reference Number(s): 02-06-04-023A, Date of Issue: June, 2002 Superceded Bulletin(s): 02-06-04-023 Related Ref Number(s): 02-06-04-023, 02-06-04-023A ARTICLE BEGINNING DESCRIPTION Audible Spark Knock (Detonation), MIL Illuminated, DTC P0332 Set (Replace Rear Bank Knock Sensor and RTV Area Around Sensor) Some customers may comment on a mild to severe engine ping (commonly referred to as spark knock), usually worse during acceleration and/or an illuminated MIL. Upon investigation, the technician may find DTC P0332 set. CADILLAC: 2002 Escalade, Escalade EXT with 6.0L Engine CHEVROLET: 1998-2002 Camaro, Corvette with 5.7L Engine; 1999-2002 Silverado, Suburban, Tahoe; 2002 Chevrolet Avalanche with 4.8L, 5.3L or 6.0L Engine GMC: 1999-2002 Sierra, Yukon, Yukon XL with 4.8L, 5.3L or 6.0L Engine PONTIAC: 1998-2002 Firebird with 5.7L Engine SECTION: 06 - Engine/Propulsion System NOTE: This bulletin is being revised to add Cadillac Escalade and Cadillac Escalade EXT to the Models. Please discard Corporate Bulletin Number 02-06-04-023 (Section 6 - Engine/Propulsion System). Here's what's involved, and yes frequent washin does make it worse!:


https://www.2carpros.com/forum/automotive_pictures/62217_p0332a_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_p0332b_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_p0332c_1.jpg



https://www.2carpros.com/forum/automotive_pictures/62217_p0332d_1.jpg

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Wednesday, May 5th, 2021 AT 2:13 PM (Merged)
Tiny
MALZONE GRIGGS`
  • MEMBER
I haven, t wash it in bout a year just keeping her running good and clean till I can get them fix. Lot of money rite now.
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Wednesday, May 5th, 2021 AT 2:13 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
Shop around you might get it for less at a local shop if there is a good one in your area.
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Wednesday, May 5th, 2021 AT 2:13 PM (Merged)
Tiny
HYDRO88
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
Tools I need to change a knock sensor from 2002 chevy silverado
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Wednesday, May 5th, 2021 AT 2:14 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
ENGINE VALLEY COVER REPLACEMENT

Removal Procedure

Fig. 68: View Of Knock Sensor Wire Harness
Courtesy of GENERAL MOTORS CORP.
1. Remove the intake manifold. Refer to Intake Manifold Replacement.
2. Gently pry up the rubber covers.
3. Disconnect the knock sensor electrical connectors.
Fig. 69: View Of Knock Sensors
Courtesy of GENERAL MOTORS CORP.
4. Remove the knock sensors.
Fig. 70: View Of Engine Valley Cover, Gasket & Bolts
Courtesy of GENERAL MOTORS CORP.
5. Remove the engine valley cover bolts.
6. Remove the engine valley cover and gasket.
7. Discard the old gasket.
Fig. 71: View Of Knock Sensor Oil Seals & Cover
Courtesy of GENERAL MOTORS CORP.
8. Remove the knock sensor oil seals (1) from the cover (2).
9. Clean and inspect the engine valley cover. Refer to ENGINE VALLEY COVER
CLEANING & INSPECTION.
Installation Procedure

Fig. 72: View Of Knock Sensor Oil Seals & Cover
Courtesy of GENERAL MOTORS CORP.
1. Lubricate the NEW knock sensor seals (1) with clean engine oil.
2. Install the knock sensor oil seals (1) into the engine valley cover (2).
Fig. 73: View Of Engine Valley Cover, Gasket & Bolts
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: All gasket surfaces should be free of oil or other foreign material
during assembly.
NOTE:
Refer to Fastener Notice in Cautions and Notices.
3. Install the engine valley cover and a NEW gasket onto the engine block.
4. Install the engine valley cover bolts.
Tighten: Tighten the bolts to 25 N.M (18 lb ft).
Fig. 74: View Of Knock Sensors
Courtesy of GENERAL MOTORS CORP.
5. Install the knock sensors.
Tighten: Tighten the sensors to 20 N.M (15 lb ft).
Fig. 75: View Of Knock Sensor Wire Harness
Courtesy of GENERAL MOTORS CORP.
6. Connect the knock sensor electrical connectors.
7. Push down on the rubber covers.
8. Install the intake manifold. Refer to Intake Manifold Replacement.
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Wednesday, May 5th, 2021 AT 2:14 PM (Merged)
Tiny
MGILROY
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 121,500 MILES
I have an 01' 5.3L Silverado that needs a knock sensor replaced. I have the part, just need to know where it is at, how to replace it and how long it should take. Thanks!

Matt
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Wednesday, May 5th, 2021 AT 2:14 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
Hello
Thanks for the donation.

Your knock sensor is located in the valley, under the intake manifold (See Figure Below).


https://www.2carpros.com/forum/automotive_pictures/261618_fig1_4.jpg



Replacement of your knock sensor usually takes between 2.5 - 3.0 hours for an experienced mechanic.

To remove, disconnect negative battery cable.
Remove intake manifold.
Disconnect wiring harness connector from knock sensor.
Remove knock sensor.

To install, reverse removal procedure.
Install sealant to sensor threads prior to installation.
Tighten knock sensor to 15 Ft. Lbs. (20 Nm).

Hope this helps..
Thanks for using 2carpros.com!
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Wednesday, May 5th, 2021 AT 2:14 PM (Merged)
Tiny
GREGOR7875
  • MEMBER
I have to do this in the same truck and was wondering how it worked out for you
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Wednesday, May 5th, 2021 AT 2:14 PM (Merged)
Tiny
CRYOUNTS
  • MEMBER
  • 2001 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 122,000 MILES
My check engine light is on a and a friend hooked up a reader and it says my knock sensor on bank 2 is bad. Where is this sensor located?
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Wednesday, May 5th, 2021 AT 2:15 PM (Merged)
Tiny
MHPAUTOS
  • EXPERT
Hi there ,

See table for your engine and pic for view under valley cover.

Mark (mhpautos)


https://www.2carpros.com/forum/automotive_pictures/61395_1_38.jpg



https://www.2carpros.com/forum/automotive_pictures/61395_1_39.jpg

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Wednesday, May 5th, 2021 AT 2:15 PM (Merged)
Tiny
CRYOUNTS
  • MEMBER
So you have to remove the intake to get to the sensors
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Wednesday, May 5th, 2021 AT 2:15 PM (Merged)

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