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1993 knock sensor code

Threw code 43 Knock sensor, replaced it , still throws the same code. Any help

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Did you reset the system ( clear the codes )? if so check that you are firing and or getting spark at all cyclinders. also check the wire to he knock sensor as they have a tendancy to get brittle and break inside. Good luck

Posted on Oct 26, 2008

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Posted on Jan 02, 2017

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I have read your problem, you can easily get the solution of your problem from toolsnyou site. I was also facing a problem like this. They help me a lot by providing service manuals. Do visit it once. http://toolsnyou.com/

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P0325, P0330 are both knock sensor codes that are detected by your ECU. Considering that you are showing both codes indicates that your model trim level is either "Limited" or "Renegade" that will have a knock sensor for 2 banks (V6). Knock sensor errors will change the timing of your engine ignition and can lead to a drop in performance or worse, lead to engine stalling in order to save other components of your engine.
The common solution to remove knock sensor codes is to have the sensors replaced by an authorized mechanic; sometimes shorted electrical leads to the sensors are also a cause for the codes. Replacing the knock sensors will remove the prompting of P0325, P0330 and expect to find another fault as engine stalling is not always present with knock sensor error codes.
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Trouble code 43. 1993 C 1500 5.7 automatic


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This should not give you a drivability issue. Its the 02 sensor after the cat. When you get a heater code it always 99% of the time points to a burnt out heating element just like a house dryer does.

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1989 K1500 GETTING CODE 43 NEW ENGINE REPLACED KNOCK SENSOR AND THE CONTROL MODULE.


The 43 is the knock sensor, the wires must be broken or fused together to continue to get the same code.
Testing the sensor for the DIY Knock sensors detect detonation ( knocking ) by reacting to the ping by retarding the ignition timing so you will need a timing light for this. connect the timing light and locate the knock sensor, ( many are on the intake manifold ) now use a metal object to tap ( not too hard and not on the sensor itself ) on the intake manifold ( light tapping should suffice ), if the sensor is functioning you will see the timing ******. If the timing does not ****** you will need to check voltage across the terminals of the knock sensor connector.
Though that excerpt says your sensor is in the intake,I believe yours is in the water drain hole for the engine block.
I also found that most shops are to replace the wire to the knock sensor because of so much failure of those wires because of heat.
Enough information?Repost if this doesn't help and we can look at some other things to try.

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1 Answer

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code 43 throttle position sensor out of adjustment.not working.if you replace knock sensor and it still spark knocking.make sure the wire connector is not broken.go to higher octane gas .make sure engine timing is correct. also make egr valve is opening when it suppose to it will cause detonation.you will need a scanner to check tps and egr valve.

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Code 43 has different meanings.It has to do with the knock sensor, electronic spark timing failure, left O2 sensor failure, and equate code 42a. Ithink that has to do with ignition switch failure. Good luck.

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1 Answer

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Check for a 5 volt reference signal at the wiring to the knock sensor. With key on engine off one of the wires to the sensor should have 5 volts.

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