Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevy Trucks, SUV's, Crossovers & Vans > Silverado & Fullsize Pick-ups
Sign in using an external account
Register Forgot Password?
Search

Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
Sponsored by: Bakliner

Reply
 
 
 
 
LinkBack Thread Tools
  #1  
Old 10-23-2008, 06:10 PM
 
Join Date: Oct 2008
Posts: 1
Default 2001 Silverado P0332 knock sensor problem

Hey all, been having some problems with my truck the last few weeks. Got a code P0332 2 weeks ago for bank2 knock sensor. I found some tsb's relating to it, they mentioned water getting into the intake valley and that you should replace the sensor. I pulled the intake and sure enough the valley that holds the bank2 (rear) knock sensor was full of water. I replaced it siliconed both caps in place also changed all related gaskets..Since then the code comes back every 2 key cycles and I can't get rid of it. I have checked for vacum leaks(smoked the intake), ohmed the harness and changed the oil. I only have 55,000 on the motor and there are no major engine noises. Not sure if anyone has ever heard of this?? Today I pulled the connector on the pcm and checked the connectin all is good..Any sugestions would be appreciated.
Register today for free or log-in if already registered to remove this ad!
Reply With Quote
  #2  
Old 03-15-2009, 09:27 PM
Junior Member
 
Join Date: Mar 2009
Posts: 1
Default P0332 Rear knock sensor 2001 GMC Sierra 1500 4.8

I have been having the same problem, ive replaced both sensors and the wiring harness, checked frequency and faults all the way to the PCM all seems fine, but the code keeps coming back, p0332, all i can figure is the PCM has an internal problem and needs to be replaced, however this is costly and not positivly the problem. Im also thinking of switching the wires for front and rear knock sensor so that it, in theory, should throw the p0327 which is the front sensor. this would reassure me that my sensor and wiring is good.

Have you solved your issue? if so, what was the problem?

Thanks to anyone who responds.
Reply With Quote
  #3  
Old 06-22-2010, 10:25 AM
CF Junior Member
 
Join Date: May 2010
Posts: 75
Default knock sensor

Does anyone else have this problem with the 5.3?
If so how did you get it fixed.

Sorry to drag up this old thread, but in all my knock sensor related searches i have yet to find an answer.
Reply With Quote
  #4  
Old 06-22-2010, 11:46 AM
LARIDERS's Avatar
CF Active Member
2006 Chevrolet Silverado 2500
My Garage
 
Join Date: Apr 2010
Location: Michigan
Posts: 294
Default

how many miles are on the motor and what year? I have herd of noisy vavles and vavle clatter setting off the knock sensors. from what I have herd they are very sensitive. when I got my pcm done the had to de-sensitize them becuase the said it would make to much noise under boost and throw codes.
__________________
04 suburban leather loaded
Supercharged 9 psi boost
Chrome package
Custom pcm
Electric fan conversion
Dual exhaust
Custom CAI
Triple pillar mount with gauges
Summer tires - 20 inch chrome with cooper H/T plus
Winter tires - stock rims with Bridgestone APT
Energy suspension kit
Air bagged rear end
Prodigy p3 brake controller
Your vehicle can go as fast as you wallet will let it
Buy a hybrid I need your gas
As always, Drive it like you stole it
Reply With Quote
  #5  
Old 06-22-2010, 01:21 PM
CF Junior Member
 
Join Date: May 2010
Posts: 75
Default

Thanks,
I read somwhere that the 5.3 builds excessive carbon deposits on the pistons closing the clearances and causing knock. I guess i will try some seafoam before i tear the intake off again.
Reply With Quote
  #6  
Old 06-26-2010, 10:52 PM
CF Beginner
 
Join Date: Jun 2010
Posts: 1
Default

I am having the same type of problem. I have replaced both sensors and the harness, then still had the same problem my mechanic said that it has to be the ECM ( down by the battery ) so i bit the bullet and replaced it.40km. later same low input code. what next???????
Reply With Quote
  #7  
Old 10-01-2010, 04:27 PM
CF Beginner
 
Join Date: Oct 2010
Posts: 1
Default

will it hurt the truck to drive it with the knock sensor (2) bad??
Reply With Quote
  #8  
Old 10-02-2010, 11:14 PM
tinbender59's Avatar
CF Active Member
 
Join Date: Jul 2010
Posts: 184
Default

driving with a Knock sensor code will kill your millage and power, the ECM will be running in "limp in mode" meaning flat timing and fuel curve. I do not know about the LS series engines, but the 4.3l, 305cid, 5.7l, all of the metric 4 & 6 cylinder engines, and all of the mark IV "that is big block old school" the knock sensor goes in the water jacket. ya see water transmits sound better than metal, thus giving the knock sensor better sensitivity. now what you need to do is find the source of the Knock or why the knock sensor is NOT picking up the knock. a short EFI lesson: the ECM is always searching for the best advance and AFR. it will advance the timing until It hears a knock, then It will readjust then start leaning out the fuel looking at the O2 sensor. it does this so fast that you never feel the slight power drop or hear the knock. if it (the ECM) does not hear the knock by a certain advance it will throw a code as well as if it hears it to soon, or abnormally. see if you can get some one with a program or purchase your own for your laptop get it up and running. Then drive the truck, have some else monitor the knock sensor to see which it is. this is what I use http://www.obdcom.com/index.htm hope this helps
Reply With Quote
  #9  
Old 10-03-2010, 08:56 AM
CF Beginner
 
Join Date: Jul 2010
Posts: 18
Default

Have the same issue on my 2001 Tahoe. It is a good engine monitor tool when it is working correctly and the engine is fairley new, but after you get some miles on the engine it hears alot of normal engine noise that comes with engine age.

Does anyone know if you can by pass the knock sensor with a resistor? simliar to what you can do with the imports.
Reply With Quote
  #10  
Old 10-04-2010, 01:39 AM
tinbender59's Avatar
CF Active Member
 
Join Date: Jul 2010
Posts: 184
Default

not advised, just go to a heaver oil say 10w-40 or 20w-50 ?????
Reply With Quote
Old 10-04-2010, 01:39 AM
 
 
 
Reply

Tags
1500, 2001, camaro, chevrolet, chevy, code, harness, knock, p0327, p0332, problems, sensor, sierra, silverado, truck, wiring


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Join Chevroletforum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 11:22 PM.

Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO ©2010, Crawlability, Inc.

Emails Backup