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Old 02-02-2023, 08:33 PM   #15
Evansa22

 
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Just like everyone else is saying, check the connector to the sensor and wires. Some people don't care to put the heat boot that covers the connector and the wires back on like my picture. Or it slides down exposing the connector. I had a similar issue
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Old 05-17-2023, 08:02 AM   #16
Future1LE
 
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Was OP able to fix this? I am having this issue right now and wondering if I just need to change out the sensor. Also how long would it take? Seems pretty simple but can't be sure till I get the car on the lift.
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Old 07-18-2023, 04:46 PM   #17
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Originally Posted by Future1LE View Post
Was OP able to fix this? I am having this issue right now and wondering if I just need to change out the sensor. Also how long would it take? Seems pretty simple but can't be sure till I get the car on the lift.
I’m having the same problem, gm engineer say I’m cruising in the wrong gear so they won’t allocate any money to fix the real issue
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Old 03-31-2025, 10:25 AM   #18
chad55
 
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ZL1 Knock Sensor and Knock Sensor Circuit code

Did anyone figure out a solution to the ZL1 (2020) knock sensor and knock sensor circuit codes throwing when pushing past 120 mph, but no longer throwing the code after driving the car a couple of times in the future, normally (without pushing it)?
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Old 06-19-2025, 11:37 PM   #19
Jaydee1le
 
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Just happened to me after taking out a mustang any update or fix
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Old 06-20-2025, 06:51 AM   #20
Megahurtz
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If the car is stock, you have an issue that needs to be investigated.

If you car is tuned, you need to work with your tuner to datalog and see why it's happening.

This shouldn't happen tuned or untuned.
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Old 06-20-2025, 08:23 AM   #21
Joshinator99
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Quote:
Originally Posted by chad55 View Post
Did anyone figure out a solution to the ZL1 (2020) knock sensor and knock sensor circuit codes throwing when pushing past 120 mph, but no longer throwing the code after driving the car a couple of times in the future, normally (without pushing it)?
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Originally Posted by Jaydee1le View Post
Just happened to me after taking out a mustang any update or fix
You guys probably have air in your intercooler circuits. Very common.

Quote:
Originally Posted by Megahurtz View Post
If the car is stock, you have an issue that needs to be investigated.

If you car is tuned, you need to work with your tuner to datalog and see why it's happening.

This shouldn't happen tuned or untuned.
100% this
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Old 06-20-2025, 08:48 AM   #22
2023_ZL1-AUTO

 
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Off the wall questions: Do you have an excessive tire vibration? I had false knock after putting on my drag beadlocks w/MT ET Street R. They had horrible Road Force balance and I had excessive vibration at certain speeds. It was enough to cause false knock. I put my stock rears back on to test, and no more knock. I took the wheels/tires back to my tire store and explained how bad the tires were. They finally got me a good set of MT's. Put them on, and no knock!
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