C5 Knock Sensor Issues
Thread Starter
1st Gear
Joined: Dec 2024
Posts: 1
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C5 Knock Sensor Issues
Hi everyone,
I'm dealing with an issue on my 2001 Corvette that's throwing the codes P0327 (Knock Sensor 1 Circuit Low Input, Bank 1 or Single Sensor) and the corresponding code for the other knock sensor as well. I can clear the codes, but after about 20 miles of driving, the check engine light comes back on. This leads me to believe that its a wiring issue.
I don’t believe the engine is actually knocking, but I can provide a video of it running if that would help diagnose the problem.
Where should I start? My initial thoughts are to either replace the knock sensors or inspect the wiring (though the wiring could be a pain to diagnose). I’ve read online about common issues with these sensors, including defective replacements. If replacing the sensors is the way to go, does anyone have recommendations for reliable brands to avoid the defective ones? Also note that the car is in storage and does not need to run soon, so a longer route is possible too.
Thanks in advance for your help.
Edit: I am running 91, previous owner was running 87
I'm dealing with an issue on my 2001 Corvette that's throwing the codes P0327 (Knock Sensor 1 Circuit Low Input, Bank 1 or Single Sensor) and the corresponding code for the other knock sensor as well. I can clear the codes, but after about 20 miles of driving, the check engine light comes back on. This leads me to believe that its a wiring issue.
I don’t believe the engine is actually knocking, but I can provide a video of it running if that would help diagnose the problem.
Where should I start? My initial thoughts are to either replace the knock sensors or inspect the wiring (though the wiring could be a pain to diagnose). I’ve read online about common issues with these sensors, including defective replacements. If replacing the sensors is the way to go, does anyone have recommendations for reliable brands to avoid the defective ones? Also note that the car is in storage and does not need to run soon, so a longer route is possible too.
Thanks in advance for your help.
Edit: I am running 91, previous owner was running 87
Last edited by Shados; Dec 10, 2024 at 02:22 PM. Reason: More information
Drifting
Joined: Sep 2022
Posts: 1,785
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From: In the woods
2024 C5of the Year Finalist - Unmodified
Napa seems to make a good sensor from what I have read, I put a set in my 2K last year with no issues. I will say if they are in the valley like my 2000 they can easily get water around them which kills them in a hurry.
Tech Contributor
Joined: Jan 2007
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From: Dyer, IN
