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How hard is it to replace the knock sensor on a 2001 nissan altima

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Othere than beingin a tight spot not real difficult just unplug the lead going to it, then remove from the rear of the engin block that is tword the fire wall on the drivers side. you will need a 21mm wrench or a deep well socket

Posted on Apr 20, 2009

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1994 nissan sentra sx 200 knock sensor location


Melvia, Knock sensor located under the intake manifold between cylinder #2-3 I believe, hard to change with out removing intake manifold, but can be done. Check the attached links,instruction and guides, Good luck
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How do you replace the knock sensor on a 2001 nissan altima?


Knock sensor is located very close to oil filter, in fact, to make it easier to reach, oil filter may need to be removed. Held in by one 10mm bolt.

Oct 03, 2014 | 2001 Nissan Altima

1 Answer

How do i change a knock sensor on a 1997 Nissan Altima?


Inspect/Test/Replace


A defective knock sensor may cause engine detonation or reduced spark advance and fuel economy. When a knock sensor is removed and replaced, the sensor must be tightened to its specified torque. If the knock sensor is installed tighter than it should be, it may become too sensitive and provide an excessively high voltage signal, resulting in more spark retard than required. When the knock sensor is installed looser than it should be, the knock sensor signal will be lower than normal, resulting in engine detonation.

To replace the knock sensor:


  • Disconnect the knock sensor wiring connector.

  • Then, unscrew the sensor.

  • Remove the knock sensor.

  • Reverse the procedures to install the part.

Mar 16, 2013 | Nissan Altima Cars & Trucks

1 Answer

I have Nissan Altima 2001 running 93500 K. since last a week service engine soon light on and showing P0141 & 0325 codes. What is the fix for P0141 and P0325 error codes.


p0325 = bank 1 sensor 2 oxygen sensor p0141 = knock sensor
if it were me you could watch the sensor on a scanner to see if working properly but without a scanner i'd replace the oxygen sensor bank 1 = passenger side
sensor 2 is sensor behind the catalictic converter screwed in

good luck

Jun 27, 2011 | Nissan Altima Cars & Trucks

1 Answer

I need a diagram/schematic of the location for the knock sensor for a 1997 nissan altima where can that be found?


never replace a knock sensor. It only retards the spark to prevent spark knock - rarely. It is buried in teh engine and is $600 to replace.
You may have a broken engine mount casuing the sensor to set a code.

Sep 24, 2010 | Nissan Altima Cars & Trucks

1 Answer

How to replace knock sensor in 1995 nissan altima


remove the intake manifold ,remove radiator ,remove radiator intake and outake housing, remove fan ,remove all belts: power steering, alternator and if you have a/c, remove harmonic balancer ,remove timing belt covers, remove timing belt remove intake housinng once you have remove all the above, your freaken engine will look naked, you can see the location of the knock sensor is locate in the engine valley

Jan 20, 2010 | 1995 Nissan Altima

1 Answer

Nissan altima 2000 2.4l p135 and p325 come up ,


I would start with the o2 sensor first if its not working right it will set off the knock sensor but beware of vaccum leaks sounds like your running lean

Nov 12, 2009 | 2000 Nissan Altima

3 Answers

Need to replace knock sensor on 98 nissan altima where is it


It is where the dashed circle is at the end of the line...

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Email me at greg.bernett@mcchord.af.mil for a larger pic....we can't post them that large here.

Jul 29, 2009 | 1998 Nissan Altima

1 Answer

KNOCK SENSOR NEED TO REPLACE BUT MY CAR TURNS OVER BUT DOES NOT


No, knock sensor will not cause NO start condition. You have a different problem.

Dec 20, 2008 | 2001 Nissan Altima

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