As advised, i bought a new sensor and harness to do the repair but i still don't know where it hooks up to. Then once again, tap on an engine location near the sensor. I was supposed to find the engine compartment end of the harness, plug in the new knock sensor and then mount it securely elsewhere on the engine. Heath What I do is measure the resistance and tap the bottom with a hammer to make sure the resistance returns to normal. When the sensor malfunctions, two common complaints become a noticeable lack of performance and a major decrease in miles per gallon.
Allow the engine to warm up and aim the timing light toward the timing marks on the harmonic balancer. Insist on a genuine Nissan to combine quick handling with a powerful engine. However, when faced with a Nissan knock sensor code in the P0325 through P0334 range I have never found anything besides a failed sensor. You should be able to find the wiring and connector next to the intake manifold. I've managed to free the connector so it can move around a bit, I can see both ends of the connection not at the same time , I've rotated it, nothing that looks like a release tab anywhere in sight. As long as the light is not on they usually pass. Replacing this same knock sensor part on the 3 L and 3.
In addition, some four-cylinder models carrying the 2. It is oriented vertically to the engine, unlike the two connectors below it, which are horizontal. I 'think' I've located the connection where the sub harness connects to the main harness, right behind the throttle body at the rear of the engine. I expect the sub harness to arrive today or tomorrow and it looks like I'm doing this alone. The tapping will generate a voltage which changes the meter reading but it should come back to 550,000 ohms. When you do this, you cut the original harness and splice in a replacement pigtail that attaches to the new location. For this reason I don't even bother testing them anymore, because I've never seen anything else go wrong in the circuit.
It looks like it's well buried and behind all sorts of other stuff. If you fall in this category than the choice seems clear. The knock sensor detects unwanted engine vibrations,such as spark knock. There is already a screw with another ground wire there. Plus, you'll find relocation kits, technical tips and replacement parts that help you get the job done.
C149 is near the power steering reservoir. It will take almost 6 hours to replace this part. Best regards, Junior Sep 13, 2011 first the quest, this is common for nissan, replace the knock sensor, this sensor is located under the intake manifold rear of engine, some models you can sneak sensor out without removing the intake, this will take care of that car. If not, you have a problem with the sensor or its circuit. Almost all defective or worn-out automotive parts, if unmonitored, can easily bring to additional problems to other sections.
An old-style knock sensor Courtesy: autobarn. I wonder if you could please help me out with any '99 Quest fotos or precise description indicating the exact sub harness connector to which I must connect the new knock sensor sub harness plug? The knock sensor does not turn on the check engine light. Second questions, where to relocate this on the Quest? I've managed to free the connector so it can move around a bit, I can see both ends of the connection not at the same time , I've rotated it, nothing that looks like a release tab anywhere in sight. The connector was black in color. This should take an experienced mechanic about 3-4 hours to replace.
Some vehicles may be equipped with two knock sensors. One of the things that shock me is the far-reaching number of automobiles affected by this Nissan knock sensor code. To temporarily solve the problem I put a 550K resistor in parallel with the bad sensor, and this worked fine. One bolt holds it on. This ks replacement seems like a simple, straightforward and inexpensive solution, but only if one can find the right connector. Where does the wire enter the intake manifold? As per the simpler and much less costly solution recommended by your colleagues plugging a new harness and knock sensor into the engine compartment plug instead of ripping everything off the engine to replace the original sensor , i still need to find that engine compartment plug. Cut white wire from Pin 37 about 2 inches from the back of C149.
Maybe I was to fixated on the wire being next to the throttle body. I'll let you all know how a real laymen does with this project. The knock sensor doesn't pull in a strong input like it does when it's attached to the engine block. Where does the wire enter the intake manifold? In some cases, however, an illuminated check engine light will be the only symptom. It will take almost 6 hours to replace this part. As you lean the mixture you need more advance to optimize burn time. My next move might be to the nissan dealer to try and tip a technician there if one was nice enough to point out exactly where it is that i need to plug into.
In this article will explain why it's worth your time to address the problem. Won't work well on Q, since the ground is a shield. If not, the knock sensor is bad and should be replaced. Many thanks, bobbyknapp Well Jon, i never did get any strong instruction on how to find the accessible end of the knock sensor cable in the engine compartment. You remove the bolt, pull the sensor out and put the new in.