Suburban 2002 4x4
I have new knock sensors on my suburban, about 3 months, I just change spark plugs to "Bosch Platinum+4" and I am getting a P0332 code. and my truck is a bit sluggish from full stop. I also notice the engine running a bit rough.

Is this coinsidence or can this new type of spark plugs create this problem? HELP!!!.

 

I found this


https://www.google.com/search?q=P0332&ie=utf-8&oe=utf-8

 

thanks, however I already replaced the knock sensors and knock sensor wiring harness 3 month ago. My truck problem started when I replaced the spark plugs with new "Bosch Platinum+4” spark plugs.

 

You could try new plugs again?

or at least on the side that's throwing the error. It's a fairly cheap test, right?

I'd start with what was changed, the plugs.

 

Most recommendations that I have seen is to always use the OEM recommended spark plug. This is true for all makes, not just GM.

 

+1 on the OEM plug, it has one job and there ain't much that can be done to make it any better...
Anecdotal as it may be... if a spark plug could give you better MPG or performance don't you think the vehicle manufactures would be all over it? The OEM plug in your truck is the exact same spark plug GM puts in the Corvette engine....

 

With Frikin' lasers!


Laser igniters could spell the end for the humble spark plug

I have also heard that the OEM plugs are best plugs... although I think I also have the +4 plugs in mine and have no ill effects. (nor any magic doubling of the MPG).

 

I change the Spark plugs for OE and still have the same problem P0332 (nock sensors)

1 - either the nock sensors intalled 3 month ago went bad
2 - or I think I might have an PCM problem ???

Any suggestions?

 

I generally follow the path of cheapest/easiest to replace.

So, whichever of those parts is cheaper/easier to replace, do that one first...

Could any of the wiring from the knock sensor have been damaged during the install?

 

Check the wiring to the knock sensor, make sure not have gotten pinched or burned/melted from improper routing ...