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Location of knock sensor

Tiny
ABBIETRRS
  • MEMBER
  • 1999 NISSAN MAXIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 179,000 MILES
How to replace a knock sensor
Wednesday, December 15th, 2010 AT 2:42 PM

13 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hello,

Must remove intake manifold located in valve under see diagrams. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, December 15th, 2010 AT 2:45 PM
Tiny
TZ3536
  • MEMBER
  • 1 POST
  • 1997 NISSAN MAXIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 126,782 MILES
How to change the knock sensor, where is it located? What tools do I have to have? Anything must know?
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Tuesday, March 19th, 2019 AT 2:39 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
The knock sensor on VG30E engines is located under the rear exhaust manifold.

The knock sensor on VE30DE and VQ30DE engines is located between the cylinder banks, under the exhaust manifold. For removal, the intake manifolds must be removed.
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Tuesday, March 19th, 2019 AT 2:39 PM (Merged)
Tiny
JIMMIE21
  • MEMBER
  • 1 POST
  • 1998 NISSAN MAXIMA
Electrical problem
1998 Nissan Maxima 4 cyl Front Wheel Drive Automatic na miles

Were is this part located at on this engine
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Tuesday, March 19th, 2019 AT 2:39 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I believe its a 6cyl not a 4-The knock sensor is installed in the top, center of the engine block.
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Tuesday, March 19th, 2019 AT 2:39 PM (Merged)
Tiny
MSGPVIRGO70
  • MEMBER
  • 4 POSTS
  • 1996 NISSAN MAXIMA
  • 6 CYL
  • 2WD
  • MANUAL
  • 218,000 MILES
Were is the knock sensor in my car? And can I replace it myself or do I need a mechanic to do it?
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Tuesday, March 19th, 2019 AT 2:39 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Your vehicle's knock sensor is located on top of the engine, below the intake manifold. Unbolt from mounting location and disconnect electrical connector to replace the sensor.
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Tuesday, March 19th, 2019 AT 2:39 PM (Merged)
Tiny
BIN01123
  • MEMBER
  • 1 POST
  • 1999 NISSAN MAXIMA
  • 6 CYL
  • 2WD
  • MANUAL
  • 138,000 MILES
I just had a Knock sensor replaced yesterday and I've driven 90 miles to date. When I was at 55 miles after I replaced the part I went for an emissions and the computer indicated that my car was not ready. How many miles or what needs to be done for me to get my car ready for an emissions test?
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Tuesday, March 19th, 2019 AT 2:39 PM (Merged)
Tiny
ZACKMAN
  • MECHANIC
  • 4,202 POSTS
The computer is looking for 2 trouble-free drive cycles. It is hard to say mileage-wise. It all depends on the speed, road condition, engine performance, among other things. In a nut shell, even though you have driven for 90 miles, but if the trips have been stop and go, you change speed all the times, transmission has to shift through gears all the times, that does not count as successful drive cycle.

What I have found to work is that if you can find an open flat highway, somewhere where you can drive for minimum 30 uninterrupted minutes, just set the cruise control at 55, drive. Do not use brake, do not downshift, do not accelerate, let the cruise control drive on its own (one speed) for a minimum of 30 minutes. Once that is accomplished, you have one successful drive cycle. Turn of the vehicle, wait a few minutes, start the vehicle, and perform another drive cycle.
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Tuesday, March 19th, 2019 AT 2:39 PM (Merged)
Tiny
NEWJERZ
  • MEMBER
  • 1 POST
  • 1999 NISSAN MAXIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 191,000 MILES
Last week, I noticed that the engine was having a rough idle, the service engine light did not come on but I anticipated that one of the cyclinders was misfiring. This weekend, I changed the sparkplugs and when I tried lifting the #4 ignition coil out, it basically broke in half with little force. I thought I figured out my problem. I changed the spark plugs and the ignition coil on the #4 cylinder on Saturday. On Monday afternoon, my wife was driving the car and she admitted that while accelerating with force after pressing the overdrive button, the service engine soon light came on. I got the codes read at Autozone and P0304 & P0325 came up. Please note that the car is running smoothly but she is complaing that there is a slight loss of power. P0304 is the code for cylinder 4 misfire. My question is: Is it possible that the code P0304 is only showing up because of my previous problem and since I fixed it, it shouldn't be showing up now. Code P0325 is the knock sensor and I am going to have this checked this weekend.
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Tuesday, March 19th, 2019 AT 2:40 PM (Merged)
Tiny
STEVEW84
  • MECHANIC
  • 673 POSTS
The p0304 might be from before. Did you ever check for codes before you did the tune-up? The knock sensor codes are always coming on Nissans. Its an easy job for the knock sensor. I would say clear the codes and see what comes back.
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Tuesday, March 19th, 2019 AT 2:40 PM (Merged)
Tiny
THORSESGIRL
  • MEMBER
  • 1 POST
  • 1999 NISSAN MAXIMA
Electrical problem
1999 Nissan Maxima 6 cyl Two Wheel Drive Automatic

Can I still drive my car if the knock sensor has gone out but I have replaced my plugs and coils?
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Tuesday, March 19th, 2019 AT 2:40 PM (Merged)
Tiny
ZACKMAN
  • MECHANIC
  • 4,202 POSTS
You will damage your engine block if you prolong the engine knocking. I don't recommend it (but I do know it is an expensive sensor) you can do short trips and don't rev the motor too quickly or abruptly. Let it build speed slowly and steadily, and without any excessive speed. And replace the sensor as soon as you can.
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Tuesday, March 19th, 2019 AT 2:40 PM (Merged)

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