Anyone Replaced a Knock Sensor Harness?
#1
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My 2005 G35 Coupe has been showing a constant P0327 Knock Sensor Circuit Low Input diagnostic trouble code (CEL, SES, DTC), so I decided to check out the knock sensor. A poster on my350z mentioned he had the same problem, but it turned out to be the knock sensor harness, not the knock sensor itself. I had Lokey Infinity price a knock sensor harness and they said it cost $843. Wow! I think I'll check things out before I tackle that. The knock sensor itself was only $51.
I took the top of my motor off today to get to the knock sensor and harness. You have to remove a lot of stuff to get at one crummy knock sensor bolt.
![](http://i15.photobucket.com/albums/a361/___jb/My%20G35/Knock%20Sensor/KnockSensor014310.jpg)
Here's my knock sensor. I'm kinda concerned because it looks like the knock sensor harness is pulled backwards. I would have tried to have the harness make a gradual curve around towards the back of the block. Maybe there isn't enough room for that.
![](http://i15.photobucket.com/albums/a361/___jb/My%20G35/Knock%20Sensor/KnockSensor024297.jpg)
![](http://i15.photobucket.com/albums/a361/___jb/My%20G35/Knock%20Sensor/KnockSensor034299.jpg)
Here's where the cable runs out the back of the block.
![](http://i15.photobucket.com/albums/a361/___jb/My%20G35/Knock%20Sensor/KnockSensor044303.jpg)
Has anyone replaced this harness? Does it really cost $843?
Thanks for any help.
I took the top of my motor off today to get to the knock sensor and harness. You have to remove a lot of stuff to get at one crummy knock sensor bolt.
![](http://i15.photobucket.com/albums/a361/___jb/My%20G35/Knock%20Sensor/KnockSensor014310.jpg)
Here's my knock sensor. I'm kinda concerned because it looks like the knock sensor harness is pulled backwards. I would have tried to have the harness make a gradual curve around towards the back of the block. Maybe there isn't enough room for that.
![](http://i15.photobucket.com/albums/a361/___jb/My%20G35/Knock%20Sensor/KnockSensor024297.jpg)
![](http://i15.photobucket.com/albums/a361/___jb/My%20G35/Knock%20Sensor/KnockSensor034299.jpg)
Here's where the cable runs out the back of the block.
![](http://i15.photobucket.com/albums/a361/___jb/My%20G35/Knock%20Sensor/KnockSensor044303.jpg)
Has anyone replaced this harness? Does it really cost $843?
Thanks for any help.
#2
#3
Wow. Good find. It's good to know the failure was inflicted and not just some random failure of the wiring itself.
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