Question about 1999 Chevrolet Suburban

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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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01 chevy Silverado 2500 misfires multiple cylinders replace 02 sensor map sensor fuel injector cleaned maf sensor it is throwing a code for knock senor 2 circuit my question is can a knock senor be bad...


No a knock sensor can not make a misfire. Check the coils, plugs and fuel pressure .The random misfires are cause the knock sensor to throw the code.

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I have an 02 jeep liberty stalls after warm and is throwing multiple knock sensor codes p0325, p0330 help


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.
Hope this helps.

Nov 05, 2013 | Cars & Trucks

3 Answers

Diagnostic code po325 what does this mean


Hi the error code relates to the PCM Knock Sensor Circuit

A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. The knock sensor generally threads into the engine block. This P0325 code may show up intermittently or the Service Engine light may be lit constantly.
Symptoms

You may notice drivability problems including a lack of power and perhaps some hesitation. There may also be other symptoms.
Causes

A code P0325 most likely means one or more of the following has happened:

* The knock sensor is faulty and needs to be replaced
* There is a wiring short/fault in the knock sensor circuit

Possible Solutions

* Check the resistance of the knock sensor (compare it to factory specs)
* Check for broken/frayed wires leading to the sensor
* Replace the knock sensor

Hope this helps
Steve

Mar 03, 2011 | 1993 Jeep Grand Cherokee

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1990 grand prix 3.1 computer code 43


engine code 43 - electronic spart timing problem- possible knock sensor problem.. check for 5v at knock sensor wire.. if it has 5v then probably need a knock sensor.

Apr 12, 2010 | 1990 Pontiac Grand Prix

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Trouble code 43. 1993 C 1500 5.7 automatic


code p0043 is the heater circuit on bank 1 sensor 3.

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.

Jan 28, 2010 | 1996 Chevrolet C1500

1 Answer

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.

Jan 17, 2010 | 1996 Chevrolet C1500

1 Answer

Engine code 43 lights up engine has spark knock repaced esc module knock sensor tuned it up it runs rich and has the spark knock isssue


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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Intermittent long crank times hot or cold service lamp on intermi


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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