Knock Sensor Malfunction - Please help!!
Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,669
Likes: 98
From: Jacksonville FL
Knock Sensor Malfunction - Please help!!
Can anyone help me out with a recurrent code P0332? It keeps appearing despite multiple DIC resets.
Can anyone post an engine schematic to show me where the knock sensors are, please? I hate to keep driving with a faulty sensor, but I don't know where to look.
All assistance is greatly appreciated.
Can anyone post an engine schematic to show me where the knock sensors are, please? I hate to keep driving with a faulty sensor, but I don't know where to look.
All assistance is greatly appreciated.
Drifting
Joined: Jul 2002
Posts: 1,484
Likes: 0
From: Morgan Hill Ca.
Two sensors mounted in the valley cover right under your intake manifold! Go to http://www.ls1howto.com/ and look at the intake manifold swap. or the EGR mod. Good luck!
Originally Posted by 99HRDTP
Can anyone help me out with a recurrent code P0332? It keeps appearing despite multiple DIC resets.
Can anyone post an engine schematic to show me where the knock sensors are, please? I hate to keep driving with a faulty sensor, but I don't know where to look.
All assistance is greatly appreciated.
Can anyone post an engine schematic to show me where the knock sensors are, please? I hate to keep driving with a faulty sensor, but I don't know where to look.
All assistance is greatly appreciated.
Racer
Joined: Mar 1999
Posts: 413
Likes: 0
From: Pennsville, NJ
Before you go taking off your intake, take a look on the back of the intake on the driver's side. Typically you will see a wiring harness clipped on a bracket behind the intake and bolted to the intake. This is the harness for your knock sensors. It may have come loose. If not, disconnect it and put some dilectic grease on it. I've had to do that with other sensors, especially the wheel sensors.
That being said, I had a knock sensor failure too and I did have to remove my intake. The knock sensors sit in the valley cover on top of rubber seals (grommets?). One of my seals came loose and put oil all over the sensor. If you do have to remove the intake it may be a good time to upgrade to an LS6 or FAST intake.
That being said, I had a knock sensor failure too and I did have to remove my intake. The knock sensors sit in the valley cover on top of rubber seals (grommets?). One of my seals came loose and put oil all over the sensor. If you do have to remove the intake it may be a good time to upgrade to an LS6 or FAST intake.
Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,669
Likes: 98
From: Jacksonville FL
Originally Posted by Byter
Before you go taking off your intake, take a look on the back of the intake on the driver's side. Typically you will see a wiring harness clipped on a bracket behind the intake and bolted to the intake. This is the harness for your knock sensors. It may have come loose. If not, disconnect it and put some dilectic grease on it. I've had to do that with other sensors, especially the wheel sensors.
That being said, I had a knock sensor failure too and I did have to remove my intake. The knock sensors sit in the valley cover on top of rubber seals (grommets?). One of my seals came loose and put oil all over the sensor. If you do have to remove the intake it may be a good time to upgrade to an LS6 or FAST intake.
That being said, I had a knock sensor failure too and I did have to remove my intake. The knock sensors sit in the valley cover on top of rubber seals (grommets?). One of my seals came loose and put oil all over the sensor. If you do have to remove the intake it may be a good time to upgrade to an LS6 or FAST intake.
Thanks for the ideas to both of you. Unfortunately (or not), I already have the LS6 intake.
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Do you wash your engine?
GM released a service bulletin for owners who had knock sensors faulting. Basically water would get on top of the valley cover and then run down into the opening the knock sensors sit in and corrode/short out the sensors.
The service bulletin says to replace the faulty knock sensor and then use RTV to build a dam around the openings of both knock sensors to keep puddling water out of the openings.
GM released a service bulletin for owners who had knock sensors faulting. Basically water would get on top of the valley cover and then run down into the opening the knock sensors sit in and corrode/short out the sensors.
The service bulletin says to replace the faulty knock sensor and then use RTV to build a dam around the openings of both knock sensors to keep puddling water out of the openings.
Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,669
Likes: 98
From: Jacksonville FL
Originally Posted by runamuk
Do you wash your engine?
GM released a service bulletin for owners who had knock sensors faulting. Basically water would get on top of the valley cover and then run down into the opening the knock sensors sit in and corrode/short out the sensors.
The service bulletin says to replace the faulty knock sensor and then use RTV to build a dam around the openings of both knock sensors to keep puddling water out of the openings.
GM released a service bulletin for owners who had knock sensors faulting. Basically water would get on top of the valley cover and then run down into the opening the knock sensors sit in and corrode/short out the sensors.
The service bulletin says to replace the faulty knock sensor and then use RTV to build a dam around the openings of both knock sensors to keep puddling water out of the openings.
I've used detailing sprays before car shows in the past, but never water. My car is a daily driver with close to 70,000 miles on it, and the code just started last week.
Would having the LS6 manifold change the position of the sensor? Does the dealer need to know this info. if I need to bring the car there? Anyone have a picture or schematic that they can post from the service manual showing the sensor locations?
thanks.
Drifting
Joined: Jul 2002
Posts: 1,484
Likes: 0
From: Morgan Hill Ca.
No the manifold does not change the sensor position it is mounted in the valley cover under the manifold. Unless the dealer checks the stamping cover or notices there is no channel on the bottom of the manifold there is no other exterior indication that it is a LS6 manifold.
Did you check the connection at the back of the manifold??
If you did a manifold change there may be a chance that a wire got pinched. Go to the LS1 how to under manifold change and you can see the sensor mounting there or in the EGR mod section.
Did you check the connection at the back of the manifold??
If you did a manifold change there may be a chance that a wire got pinched. Go to the LS1 how to under manifold change and you can see the sensor mounting there or in the EGR mod section.
Originally Posted by 99HRDTP
I've used detailing sprays before car shows in the past, but never water. My car is a daily driver with close to 70,000 miles on it, and the code just started last week.
Would having the LS6 manifold change the position of the sensor? Does the dealer need to know this info. if I need to bring the car there? Anyone have a picture or schematic that they can post from the service manual showing the sensor locations?
thanks.
Would having the LS6 manifold change the position of the sensor? Does the dealer need to know this info. if I need to bring the car there? Anyone have a picture or schematic that they can post from the service manual showing the sensor locations?
thanks.
Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,669
Likes: 98
From: Jacksonville FL
Originally Posted by BlueDragon
No the manifold does not change the sensor position it is mounted in the valley cover under the manifold. Unless the dealer checks the stamping cover or notices there is no channel on the bottom of the manifold there is no other exterior indication that it is a LS6 manifold.
Did you check the connection at the back of the manifold??
If you did a manifold change there may be a chance that a wire got pinched. Go to the LS1 how to under manifold change and you can see the sensor mounting there or in the EGR mod section.
Did you check the connection at the back of the manifold??
If you did a manifold change there may be a chance that a wire got pinched. Go to the LS1 how to under manifold change and you can see the sensor mounting there or in the EGR mod section.
Thanks, again. Will check it out.
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Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,669
Likes: 98
From: Jacksonville FL
Originally Posted by BlueDragon
No the manifold does not change the sensor position it is mounted in the valley cover under the manifold. Unless the dealer checks the stamping cover or notices there is no channel on the bottom of the manifold there is no other exterior indication that it is a LS6 manifold.
Did you check the connection at the back of the manifold??
If you did a manifold change there may be a chance that a wire got pinched. Go to the LS1 how to under manifold change and you can see the sensor mounting there or in the EGR mod section.
Did you check the connection at the back of the manifold??
If you did a manifold change there may be a chance that a wire got pinched. Go to the LS1 how to under manifold change and you can see the sensor mounting there or in the EGR mod section.
I pulled off the fuel rail cover today and tried to find this harness. Things are pretty tight down in there. Deep to the injectors, I saw a blue capped interface near where you describe it to be. Is this the correct place to check for a loose wire?
Thanks.
---------
Mike
Drifting
Joined: Jul 2002
Posts: 1,484
Likes: 0
From: Morgan Hill Ca.
No, around the back of the Intake manifold. I think you are going to have to pull the manifold anyway to get to the sensors. and the wires.
The two round things in the center are your knock sensors.
The two round things in the center are your knock sensors.
Last edited by BlueDragon; Jan 17, 2005 at 10:43 AM.
