May 20, 2016, 11:56 AM
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Replaced knock sensor still getting p0327
Replaced knock sensor still getting p0327 I just replaced my knock sensor in my 2001 camaro ss, which was a pretty big pain to do....But the code came back on my test drive along with a 02 sensor code..What can be causing the knock sensor code? the car drives fine with no abnormal sounds
Launching!
Joined: Jun 2009
Posts: 268
Likes: 1
PO327 Knock sensor 1 circuit low imput bank 1. Did you change the sensor with a new one. You probably did but it could be bad. You will have to tone out the wiring back to the ECM. Check all wiring and make shure the connector prong did not push out of the plastic clip. What is the O2 code???? What side was the Knock sensor on???
I replaced the knock sensor with a new one from autozone, the one that I replaced was the front on closet to the grill..It was connected properly(connection was tight)...The 02 sensor code I am getting is p0135 I believe...What color wiring should I check and what is the easiest way to test it? Thanks
TECH Apprentice
Joined: Aug 2009
Posts: 389
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From: NB Canada
if there is any small amount of corosion on the plug that goes on the knock sensor replace both(wire and sensor), when i do them at work i always replace sensors and wires at same time. that way there you have done the best job possible. if we don't then if the customer come back later on with probleme on the second knock he has to pay for the labour over again. i explain to them first and they always agree. humidity collects down in there, if one goes bad the other one is not far behind.
Sometimes it is neither corrosion or a bad knock that will do it, it is the wiring harness either being pinched or wearing in two. I have seen it happen on a few intake installs. The harness will get cut or pinched between the intake and the head and it will ground the wire out, throwing that code. The new harness is not pricey at all. Plus did you use to sealer (RTV) around the knock sensor holes or at the front of the intake to keep the connection/sensor from taking on any more water? I would check it all out again. Really the intake is not much of a pain. Just remember on the back bolts to use clothes pins to hold the back bolts up when you are taking the manifold out, and you will be ok. Working under the cowl is a pain, but is definately do able.
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Also make sure the knock sensor is torqued properly, the incorrect torque can cause a knock sensor code.. but im guessing in your situation it is a wiring issue like mentioned above..
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Verdad Gallardo I did put the rtv sealant around the knock sensor to ensure to oil wouldn't get in there. The connection seemed to be fine with no corrosion, just oil...I might have to go back in there and change out the harness, not looking forward to it...The code went away for two days and decided to come back yesterday...i hope its the harness, what else could it be?
I had the same issue with a new sensor finally after messing around abnd moving the knock sensors around I figured out it was a babatch at autozone so I went to discount same thing again the harness was fine as I checked it with a multimeter finally I went to the stealership and its been fine since..
also if you drop a knock sensor they will fail, maybe during transit to you it may have fell on the floor and picked up, also i usually like said above replace both and seal them and install and new harness
Well to update my thread..I had the knock sensor that I bought from autozone replaced
yesterday with a genuine gm part along with the harness and the knock sensor code
hasn't come on after 1 1/2 hours of driving and two start ups...The autozone knock
sensor may of been defective becuase it was spinning freely in it's casing, but ill let you
guys know if the code comes back(if you're changing your ks's, get the new one from gm)
yesterday with a genuine gm part along with the harness and the knock sensor code
hasn't come on after 1 1/2 hours of driving and two start ups...The autozone knock
sensor may of been defective becuase it was spinning freely in it's casing, but ill let you
guys know if the code comes back(if you're changing your ks's, get the new one from gm)
I payed $110.00 for one knock sensor and wiring harness. I know you can get
them cheaper online but I didn't have the time. And you might as well change
the harness while you're in there rather than going back in later. I did notice
the car drives a whole lot better and feels more responsive and did read that the
computer pulls timing because of that ks code
them cheaper online but I didn't have the time. And you might as well change
the harness while you're in there rather than going back in later. I did notice
the car drives a whole lot better and feels more responsive and did read that the
computer pulls timing because of that ks code
Last edited by jattgunman; Feb 24, 2010 at 05:59 PM.
i do this with every sensor on my car, other stuff i'll use from kragen's/autozone but when it comes to sensors i pony up the cash for the GM stuff
wow i get em for cheaper but then again a good buddy of mine is the head parts guy at the stealership
wow i get em for cheaper but then again a good buddy of mine is the head parts guy at the stealership
Ok I am having the same problem. I noticed it said it could also be low fuel pressure??? has anyone had that be the case?
and jattgunman - is it still working properly after the gm knock sensor was put in? I hope dicount will let me return the knock sensor even after being in the car for a couple weeks.
and jattgunman - is it still working properly after the gm knock sensor was put in? I hope dicount will let me return the knock sensor even after being in the car for a couple weeks.
Registered User
Joined: Jul 2020
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I had an issue with knock sensor after replacing the sensor three times. In my case, fuel filter was never replaced on my impala, and fuel line was clogged.
2001 Impala
Other symptoms:
Trouble starting
Loss of power
Trouble going up hills.
2001 Impala
Other symptoms:
Trouble starting
Loss of power
Trouble going up hills.
