Question about Nissan Frontier

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I have a 2000 nissan frontier that is reading a code of knock sensor malfunction. What would cause this. I just rebuilt the engine and trans. But had the same code before rebuild.

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Hi, the code is indicating that the computer is not receiving data from the sensor. This may be due to a bad connection or a bad sensor. The computer uses the knock sensor to optimize ignition timing, so a bad sensor may affect mileage. You can check the sensor signal at idle as follows:

2.4L (KA24DE) I4 Engine & 3.3L (VG33E, VG33ER) V6 Engine

  1. Start engine and run at idle.
  2. Measure voltage at ECM pin 64.
  3. Voltage should be approximately 2.4 vDC.
The ECM is under the center of the dash as shown in the figure below. You will have to probe the back of the connector or slice the wire open to check the voltage with the engine running. Find a good bare spot on the bare metal frame of the dash as a ground point for measuring the voltage.

The knock sensor itself is on the back of the engine between the heads on the V-6. Not sure where it is on the 4-cylinder, but it looks like the picture below with a bolt going thru the middle. You can check the voltage there instead of the ECM, if you can back-probe the connector at the white wire.


I have a 2000 nissan frontier that is reading a - jturcotte_1477.gif

jturcotte_147I have a 2000 nissan frontier that is reading a - jturcotte_414.jpgi
jturcotte_414.jpg jturcotte_1479.gif
Please let me know if you have any questions, and thanks for using FixYa.

Posted on Apr 04, 2011

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Probley a bad wire or conection check that un hoock bat 4 60 seconds hock back should reset the computer

Posted on Apr 04, 2011

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1 Answer

2000 Nissan frontier ran rough and stalled out. will not start. only code is for knock sensor. Could the knock sensor cause this?


Ecu collects data from all sensors. If they don't "add up" it throws the code. Could be corrosion on the connection or connector is off.
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code p0325 refers to knock sensor (KS) 1 bank 1 circuit malfunction===causes wiring--poor connection--KS needs replacing.

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How do I reset computer on a 2000 Nissan frontier


Why would you keep throwing parts at it and guessing what is wrong? Take it somewhere that has a scanner and see what is setting the check engine light. It could be a speed sensor, or anything for that matter. AutoZone and I am sure there are others will scan the code for free. If you live close to me I would scan it for you.

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How do I bypass a knock sensor on a 2000 Nissan frontier


The pcm uses the knock sensor to monitor for engine knocking, and adjusts ignition timing based on this. If there is no knock sensor present, you will wind up with a hard fault that will keep the check engine lamp on continuously. Also, the truck will go into a more conservative driving mode to prevent knocking.
The knock sensor for a frontier is not terribly expensive, but it is a pain to access on nissan v6s, under the intake manifold

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My 2004 nissan frontier makes a knocking sound when accelerating or when cold. It has been serviced regularly and has 74,000 miles on it. Does it have anything to do with the knocking sensor?


The knock sensor picks up vibrations from detonation and sends a signal to the engine computer, which then adjusts the igntion timing [ retards advance ] to correct it. You can read the operation of the sensor with a full function scanner, if it's working then you have to look for a physical problem with the motor causing the konck.

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I recently replaced the passenger side head gasket on my 3.3L 2000 Nissan Frontier. The Check Engine light was on so we scanned it, and it was throwing 3 codes, the first one was a Code 34, the knock...


in your air box you will see a wire with a sensor on top,,replace this sensor and engine check light will be gone the next time you start the jeep ,job done

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knock sensor is located on the block usually under the intake. nissan has problems with these sensors. i have chaunged plenty of these on nissans in the past year. this has no affect on your gas mileage. this sensor picks up misfires on the engine. sometimes you might have rough idle and can't feel it in the drivers seat but the knock sensor can. i would suggest maybe a tune up spark plugs, air filter, fuel filter first before going to take apart a bunch of things to change a sensor. the sensor is designed to pick up any differences in motor quality and will throw the engine light on. sometimes the problem is the knock sensor, or there is an underlying cause that the knock sensor is reading.

Feb 17, 2009 | 2000 Nissan Frontier

1 Answer

Knock sensor circuit problem


Well, you have another issue besides a knock sensor problem. A knock sensor code WILL NOT illuminate the check engine light. Check for other codes stored in the ECU. I have seen oxygen sensor issues cause knock sensor issues due to inaccurate fuel delivery resulting in engine ping at all times (causing the ECU to think that the knock sensor is bad because it's reporting ping at all times) - but also had codes for one or more O2 sensors.

Nissan Scope Technician- 10 years with Nissan

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