Comments on: 4 Symptoms of a Bad Knock Sensor (and Replacement Cost)

By: Sean

Sean — Thu, 10 Nov 2022 19:10:02 +0000

In reply to Tolu. When you say your car is not working, what kinds of symptoms are you experiencing?

By: Tolu

Tolu — Mon, 07 Nov 2022 16:22:39 +0000

In reply to Sean. I have a camry 2003 and my knock sensor have been giving me serious have change that and the code is still coming up and my car still not working well please what can I do please

By: Sean

Sean — Mon, 11 Jul 2022 17:03:37 +0000

In reply to James E.. I doubt there's any damage to the sensor from not disconnecting the battery. The code could be caused by an issue in the wiring, and not the sensor itself. For instance a short or bad ground could throw a code because the voltage reading from the sensor would be wrong.

By: James E.

James E. — Sun, 10 Jul 2022 19:23:43 +0000

Hi I have a 2014 Kia Rio that recently had a code P0326 pop up. I had the knock sensor replaced by a mechanic and as I was watching I noticed he didn’t disconnect the negative battery terminal before replacing the part. I’ve tried clearing the code with my scanner and disconnecting and reconnecting the battery to allow it to reset, but is it likely that upon installation it was damaged due to the battery not being disconnected beforehand?

By: Sean

Sean — Thu, 28 Apr 2022 17:52:11 +0000

In reply to Breckon Carter. I don't know. Did you mean you replaced the pistons, or the sleeves in the cylinders? When the engine work was done, were all the tolerances verified?

By: Breckon Carter

Breckon Carter — Wed, 27 Apr 2022 22:26:28 +0000

I have a 07 5.7 hemi. I had to replace my cylinder 1 and 3. I might have accidentally hit it or something I don’t know exactly. I had a knock retard at -8° the volts were at .8ish
Another frame I had a retard knock of 4.5° the first sensor being at 4.6v while the 2nd one is at .9v
The question is my knock sensor bad? Or should I look back at my pistons and see if they are over weight? What would cause the loss of preformance? How could I fix this?

By: Sean

Sean — Thu, 10 Jun 2021 16:12:49 +0000

In reply to Alan. I don't know, those sound like unrelated issues. The good news is the vehicle should be under warranty, so they should be able to get it sorted for you.

By: Alan

Alan — Thu, 10 Jun 2021 02:53:40 +0000

Hi,
I have a 2021 9speed fiat Ducato Motorhome. Two weeks ago at only 6 months old it was re-programmed to rectify the consumption of Ad-blue. The alarm light for ad-blue kept coming on at 400kms but it was a false reading as ad-blue tank was still almost full. False sensor reading. Now with only 30kms driving since re-programming the engine light came on and the vehicle went into limp mode. I drove it 15kms under 15kmh stuck in 3rd gear to the authorised repairer again and they tell me it’s a knock sensor failure. Could the re-programming 2 weeks ago have caused this new issue?
Alan

By: Sean

Sean — Thu, 22 Apr 2021 19:00:55 +0000

In reply to Selena.

You could look closer at scan data to see how intense the knock event was, and how much timing is being pulled.

It’s not great for the engine, but it’s one of those things that’s fine until it’s not. Minor knock under light load is no cause for concern but an intense knock event under wide open throttle could destroy the engine.

By: Selena

Selena — Wed, 21 Apr 2021 12:24:36 +0000

I have a 2001 Toyota Avalon LX and the check engine light came on and I had it read and the mechanic told me it’s reading a knocking code. They also told me that it’s not super urgent to fix right now because it’s not causing anything bad to happen with my car but that it’s just triggering the CEL to come on. I don’t have any sounds coming from my engine and my car seems to be driving normal. How do I know if it’s truly a problem right now or if I can wait it out? I just don’t have an extra 400 right now to drop on my car.