Knock sensor in 2002 xterra se/sc

these are designed to be placed were they are so it will only pick up a knock from the engine and not other things bolted to the engine. just replace the knock sensor were it was designed to work best.

Dear Anonymous,

I also have a 02 Xterra. I had a problem with my knock sensor also. there is no way to bypass the knock sensor, it is used by the engine when there is a knock to tell the ECM to advance or retard the distributor in order to stabilize the running of the engine. I have been told by my cousin who is a 20 year veteran Nisan Tech The knock sensor in itself does not need to be replaced unless you\'re doing a major job in which you have to remove the intake manifold because it sits on top of the engine block under the intake manifold. However, I am very strict when it comes to my truck, so I changed it. It is really up to you right now whether you want to replace it or not. If you take it to the dealer it\'s going to be very expensive! Let me know why you are looking to replace the knock sensor, you may be looking at the wrong thing.

it is absolutely not the knock sensor so dont waste time and money on it.your stalling condition is due to something else.

The knock sensor is on the back side of the engine bolted onto the block. It looks like this

Yes, a knock sensor can cause the check engine light to come on. I would change out the sensor and see if you come up with any other codes.

V6 3.3L The sensor is located underneath the air intake manifold on top of the engine block. This should take an experienced mechanic about 3-4 hours to replace.



Fig. Engine compartment component locations

Hope this help (remember rated this free help) Good luck.

I would ask for all the codes the Xterra is setting. Also, does your odometer stop working ever?

Check-- the knock sensor should be replaced if it is setting a code. Second, the misfire on number 2 hole could be a defective injector. There is a known problem for the 2002 and 2003 models. Pull the plug from #2 hole and compare it to another plug. If #2 is black and the others are not you have a leaking injector. Also, perform an ohms check on all the injectors and I bet #2 will be less than the rest. make sure you use a quality sensor, Lee Davidian

Your knock sensor is located undernesth the air intake manifold on top of the engine block. This goes for 2000-2004 xterra V6 3.3L models.

It's the valley of the engine underneath the intake manifold. It's about an $800 job because the top of the engine has to come off. However, unless you have a supercharged xterra it shouldn't effect performance. Also, the knock sensor will not trip the check engine light, as it does not indicate a primary problem, so if your light is on you should have another code that should be fixed first.