2002 nissan frontier knock sensor location

Crankshaft position sensor is on the transmission bellhousing, near the top, a bit on the driver's side. You can see it from underneath or through the driver's front wheelhouse with the wheel removed. It's a pain to change from either place. Should have a small heat shield covering it and held down with a 6Mx1.0 bolt with a 10MM head.

Delivering to Lebanon 66952 Update location Automotive Parts & Accessories ... 22060-30P00 Knock Sensor Harness Wire Nissan Frontier Pathfinder Knock Sensor 24079-31U01 2206056E11. ... Used this to replace and relocate the knock sensor on my supercharged 2002 Nissan XTerra. It's a common failure on this engine, and the sensor is buried under ...You will need to get the wiring harness connector from a 99 maxima and use the corresponding knock sensor. The position to locate it to is on the top of the intake manifold, you'll notice there is a pre-threaded hole towards the back left of the intake manifold. This is where you will mount it to. I'll take some pictures when I get home ...22060-30P00 Knock Sensor Wiring Harness for Nissan Infinity G20 Q45 QX4 I30 J30 24079-31u01 Frontier Maxima Pathfinder Knock Sensors 4.1 out of 5 stars 107 1 offer from $12.99The knock sensor is located between the cylinder heads on the engine block torwards the front of the engine. ... Read full answer. Jul 29, 2014 • 2004 Nissan Frontier. 0 helpful. 1 answer. Localization knock sensor end Nissan frontier 2002 3.3. under intake ... Which wire is positive left or right on the knock sensor harness for 2004 Nissan ...P0327 is a powertrain related OBD-II trouble code. It has the same meaning for the Nissan Frontier as it would any other vehicle. By definition, P0327 means that the vehicles ECM/PCM is getting a signal that is lower than the defined operational range. Clearing this code typically requires a new knock sensor or correcting.Unfortunately my harness to the knock sensor is screwed up. It had 1 wire in the connector and it practically fell out when I removed the sensor. This is may be why I had the code. I could use some help figuring out how the sensor is supposed to be wired. I plan on getting a new connector from wiring specialities. Any help would be appreciated ...Answered in 14 minutes by: Nissan Mechanic: LeadTech88. Hello, and thank you for your question. I am Brandon - Nissan tech. Knock sensor location is right underneath the intake manifold. You will have to …

If you ever reach the point that you detect knocking then first try going up in fuel octane and finally replace the KS if needed. '94 Nissan Altima SE, 5spd. Erebuni 905, Turboing, Hotshot CAI, UR Pulley, Calum ECU, HUD & ATC retrofitted, DEPO lamps, NGK Ignition wires. ITEMS FOR SALE.The front oxygen sensors test the oxygen levels in the exhaust and report back a voltage to the ECU. The ECU takes that voltage and changes the output of gas into the cylinders. If the O2 sensor gives a lean feedback then the ECU will output a richer mixture and vise-versa. The voltage changes constantly and the more it changes within 0 - 1 ...I have 2001 nissan frontier 3.3 and i had replaced the knock sensor and Nissan frontier engine wiring harness Knock sensor for 1999-2004 nissan frontier 3.3l v6 2002 2001 2000 2003 Knock sen ... Sensor knock location intake nissan frontier pathfinder 2000 manifold where engine 1997 4x4 thermostat under housing 2002 change located blockGenio ...In this video I will show you how to quickly test a knock sensor circuit. This procedure applies to any knock sensor that has a bias voltage sent to it and i...If you’re in the market for a reliable and versatile off-road vehicle, then look no further than the Nissan Frontier 4×4. With its rugged design, powerful performance, and advanced...location of crankshaft sensor on 2004 nissan frontier 3.3l v6 - Nissan Cars & Trucks question. Search Fixya ... location of knock sensor. Knock sensors can be difficult to locate because there usually buried under intake or exhaust manifolds and misc. engine wiring and plumbing. Knock sensors need to hear an engine knocking noise, therefore ...the knock sensor on a 3.5L should be just under the exhaust ports on the right side of the engine if you're facing the side with the pulleys and crank (front) for the life of me, I cant remember if the engine is mounted longitudinally or tranversely in the frontiers.....lol. There should be a wire going to a small black thing thats just kind of ...

2002 Nissan frontier knock sensor replacement. Search. Watch later. Share. Copy link. Info ...2002 Frontier Crew Cab V-6 4x4. Everything dead stock. Live in the country and haul stuff in it all the time. ... Ok with the sensor in your location does it receive the right frequency. How close is it to stock location. ... To get the knock sensor I got one from a 1999 Nissan Maxima for $69.00 (genuine Nissan package). You will need a bolt ...SOURCE: 2002 nissan xterra suv fuel filter location. It's under the truck on the frame rail by the gas tank. SOURCE: where is the knock sensor for the 04 nissan xterra. 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.This knowledge will save thousands of dollars in a repair. It's very common to these vehicles. Nissan VG33e v6 dreaded knock sensor p0325 code due to a fa...The Nissan Frontier pickup truck has been a popular choice among truck enthusiasts for years. With its rugged design, impressive performance, and versatile capabilities, it’s no wo...We bought in 04 with 58K miles Has 114K now. Here are the three codes: 1. PO108 - PCM determined that a malfunction exists in the electrical circuit for engine fuel temperature sensor "A.". 2. PO325 - PCM has determined that a malfunction exists in the electrical circuit for knock sensor 1. (Bank 1 or single sensor) Bank 1 identifies ...

Kayla banwarth husband.

Where is the knock sensor located on the engine (2002 Nissan Frontier, supercharged)? One person told me it was under the manifold. Another said it was on the passenger side …If you search theres a few nissan forums that pop up Search knock sensor workaround, im going with 100k and 470k resistor so thats 570k close enough i guess. Im not spending $700 to temp fix a bad …Jul 8, 2008 ... 220K views · 6:22. Go to channel · 2002 Nissan Xterra Knock Sensor relocation WITHOUT cutting wires! DIY cast•91K views · 7:24. Go to channel&n...9 posts · Joined 2018. #1 · Apr 4, 2020. My 2002 Nissan Frontier 4x2 XE 3.3, is exhibiting a quick knock sometimes or raddle knock noise from passenger side head or valve cover area only on quick acceleration and on deceleration of engine. it just one knock sound and not pinging or knock sensor problem form low obtain gas. It only is present ...The rotation of the tightening it down will obliterate the o-ring. Location is driver side top of transmission where it connects to engine reachable over the top back of engine 2 wire connector is under a metal protector held on by 10 mm hex bolt that also holds sensor on. SOURCE: location of knock sensor.

Jessbeck71 Discussion starter. 12 posts · Joined 2020. #1 · Aug 3, 2020. Hi all, I Just bought a 2001 Nissan Frontier that was showing a code P0141, 02 sensor heater problem. I replaced the the downstream sensor but code still comes up. I also noticed a third sensor in front of the rear Catalytic that has no where to plug in.I found an old buddy that works on cars and I had him do the work. After he was finished I didn't have the knock sensor code anymore and one of the O2 sensor codes was gone too. Instead I had these codes: P-0505, P-0505 PD (pending) and P-0430. The P-0430 is an O2 sensor code, and the P-0505 codes are the idle air control valve.2007 Nissan Frontier SE CCSB 4x4 6spd:noworries: Its Got Modifications. ... 2002 supercharged crew cab long bed. 33" KDW Mud Terrains, 3"body lift, 3" custom suspension lift(SLR,AC,Calmini), Custom headers, Flex a lite, E fan, Auto Tranny cooler, Nismo thermostat, Nismo exhaust and tons more! ... The stock knock sensor is in that location from ...Knock Sensor: Knock Sensor location: It's a bad picture, but it's behind all those hoses under the number 3 cylinder. Easy to install. ... (2002-2006) 4th Generation Altima Sedan (2007-2012) ... NICOclub's Nissan forums and Infiniti forums and all affiliated sites are the property of HDS Holdings, Inc.knock sensor is out after we fix the air control valve is this common | Find answers to your 2002 Nissan Quest question. ... Find a Shop. Questions / Nissan / Quest / 2002 / where is the knock sensor... Where is the knock sensor located on the engine and how much does it cost to fix. 2002 Nissan Quest. Asked by cain in Victorville, CA on ...Knock Sensor and Supercharger swap. Well I kept getting the P0328 code on my '02 SC crew cab. So I bought a new knock sensor, gaskets, beer and a freshened up supercharger last week. Spent 3 hours cleaning and diassembling engine Friday night and spent all saturday (12 hrs!) finishing the job. Where is the knock sensor located on the engine (2002 Nissan Frontier, supercharged)? One person told me it was under the manifold. Another said it was on the passenger side of the engine. The engine compartment is somewhat tight, so it's alot of work to go to both areas. Also, I removed one of the heat shields (passenger side) and saw my ... Compare 2002 Nissan Frontier Knock Sensor brands. Check prices & reviews on aftermarket & stock parts for your 2002 Frontier Knock Sensor. Order your parts online or pick them up in-store at your local Advance Auto Parts.2002 Nissan frontier knock sensor replacement. Search. Watch later. Share. Copy link. Info ...where is the cam sensor and the knock sensor located on a 2003 Nissan Frontier 3.3 c ... Started, 2002 nissan frontier 3.3 automatic 196,000 miles. Started, let warmed up 5 min., drove around block and died, won't start. Can hear pump working, checked pressure at line, feeding fuel rail have 35psi ...It’s underneath this cover right here I used the Koreans drive socket and ratchet to get to it. And let me show you right here that’s it right here. Where is knock sensor located? The knock sensor is located on the engine block, cylinder head, or intake manifold. Its senses vibrations caused by engine knock or detonation.

granitex. 1469 posts · Joined 2009. #9 · Mar 4, 2012. Bypassing the sensor is nothing more than a resistor that is placed inline before the sensor. I did mine years age, as well as a lot of other people. It is an easy 15 minute fix that you can do from the top of the motor without having to do anything else.

Car: 2002 Nissan Frontier , 4X4, Longbed. Knock Sensor - Help!! Quote; ... The entire intake system has to be removed in order to access the knock sensor's location. There is quite a bit of work and gaskets that are required for this service. Top. glenn58x Posts: 1 Joined: Wed May 09, 2007 4:50 amthis video shows you how to change the knock sensor on a 2000 model Nissan Frontier with a 3.3l V6 and shows you how to change your PCV valve on the right si...Good morning, Quartz readers! Good morning, Quartz readers! Members of the Renault-Nissan-Mitsubishi alliance meet in Amsterdam. Leaders from the three carmakers will gather for th...Advance Auto Parts has 16 different Knock Sensor for your vehicle, ready for shipping or in-store pick up. The best part is, our Nissan Frontier Knock Sensor products start from as little as $56.99. When it comes to your Nissan Frontier, you want parts and products from only trusted brands. Here at Advance Auto Parts, we work with only top ...UPDATE: 12/2012 - Due to the timing belt change I had the shop put my KS back to original location. I still recommend doing the location only for the non-SC v6 engine if you want to get rid of the KS code but do not want to spend ~600$ to get the KS changed. As some of you know I did the KS...Knock sensor wiring. Jump to Latest Follow ... 2002 Frontier 3.3L Supercharged, 4x4 King Cab. Performance mods: AC Offroad stainless Headers, AC Gibson Catback, Volant CAI, 2.4" Pulley. ... Welcome to our Nissan Frontier Forum! A premier community to share your mods and builds. Chat with like-minded Frontier owners.The stock knock sensor is below the lower air intake and sits on top the engine black. The air intake is bolted to head which are bolted to the engine block. The stock sensor is in optimum location the relocation is close to optimum.3.1.Step 1. Check For Diagnostic Trouble Codes (DTCs) 3.2.Step 2. Perform a Visual Inspection. 3.3.Step 3. Test the Knock Sensor Directly. 4.Knock Sensor Location. 5.Where to Get a New Knock Sensor for Your Vehicle. Your car contains what seems like an endless array of sensors, one of which is the knock sensor.Nissan Mechanic: Jay. Hello and thank you for using JustAnswer.com. The knock sensor is part of a shielded harness. I have heard people buying Knock sensor sub harnesses for 97 Style Maxima's and tapping it the harness on the back side of the engine and putting that in and locating the knock sensor on the back of the cylinder head.Nissan Frontier Knock Sensor - Engine Sensors - Replacement API DIY Check Details 03 nissan frontier knock sensor location. Knock frontier hqrp2003 nissan sentra se-r spec v knock sensor Frontier sensor nissan knock v6 2004 2003 3l 1999 2001 2002 2000Cheap nissan frontier knock sensor, find nissan frontier knock sensor.

Tikka rebate 2023.

Paragraph roast.

The Nissan 350Z design was geared to make the car an attainable performance vehicle. Learn more about the Nissan 350 design and check out pictures. Advertisement The Z's role as sy...Nissan Mechanic: Roy Sheidenberger. HI! It is located under the intake manifold in the engine block,let me know if you have more questions, ROY! Roy Sheidenberger. Category: Nissan. Satisfied Customers: 16,749. Experience: dasdasd. Verified. Roy Sheidenberger and 87 other Nissan Specialists are ready to help you.SOURCE: nissan xterra knock sensor. 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 ...Mar 16, 2014 · 202 Posts. #521 · May 24, 2016. Oh! That's different than what I've seen. You'll probably need to test continuity with a multimeter or similar device-- Test between that inner metal surface on the knock sensor and each wire. Only one should provide continuity-- that will be your ground wire. So, the other wire (the one that is not connected to ... Hey guys today I got another Nissan v6 engine that needed a knock sensor replacement so I decided to do it a much quicker way than you would normally do.Also...2003 Nissan Frontier Magnet Sensor Assembly. Part Number: 23731-3S500. Vehicle Specific. $70.30 MSRP: $106.93. You Save: $ 36.63 ( 35%) Check the fit. Add to Cart. Product Specifications. Other Name: Sensor Assy-Magnet; Crankshaft Position Sensor.1047 posts · Joined 2005. #2 · Feb 10, 2010. There's 4 sensors. 2 before and 2 after the cats. Generally, you warm up the truck, put a meter on a sensor, at idle, and take a reading. S/b something like .5vdc. Run the revs up to about 2500rpm. You should see the voltage run up to 1vdc, or so. This is a good sensor.hi the knock sensor is located under the lower intake manifold between both cylinder heads. you will have to remove the upper and lower to get to it if this have help please press the accept button. Ask Your Own Nissan Question. Clifton B. 6,653 Satisfied Customers.Find many great new & used options and get the best deals for 18WB66V Knock Sensor Fits 1999-2004 Nissan Frontier 3.3L V6 at the best online prices at eBay! Free shipping for many products! ….

We've shown you a couple of ways to fix your posture and why it's so important. But if those aren't working out for you, this posture sensor that detects when your posture slips an...Thankfully, the 2000 Nissan Frontier Knock Sensor Wiring Diagram makes it easy to pinpoint the exact location and wiring of the knock sensor. ... Need Labor Time And Directions To Change Knock Sensor 2002 Nissan Frontier 3 Sohc Vin 1n6ed26t32c360756. Uncategorized. Related Posts. 89 Chevy Alternator Wiring Diagram.Re: Knock sensor relocation.. Post by Z-owned » Sun Dec 01, 2013 5:18 pm. Relocating it is quite popular until the ability to replace it back to the proper location is available. Most relocation kit's put it on the #6 cylinder which is the fist to detonate so it still is effective. 338,000 miles and counting !!If you ever reach the point that you detect knocking then first try going up in fuel octane and finally replace the KS if needed. '94 Nissan Altima SE, 5spd. Erebuni 905, Turboing, Hotshot CAI, UR Pulley, Calum ECU, HUD & ATC retrofitted, DEPO lamps, NGK Ignition wires. ITEMS FOR SALE.2006 Nissan Frontier 4.0L SE 4x4 with 125k KMS, Leer Cap, Bilstein 5100's, Mudflap extensions, Rear differential vent mod, Pioneer DoubleDin Touchscreen, JL Audio 3-way 6x9's, MTX Thunder Dome TDX6502 Axials 6 1/2 2-Way ... 2002 Black 4wd 5 speed Crew. ... 3 original O2 sensors from nissan. 1 EXTERRA Knock Sensor ($48.) relocated. 2 secondary ...knock sensor replacement on a Nissan Frontier 3.3 VG33EJoined May 12, 2009. 1,742 Posts. #389 · Aug 10, 2014. Knock sensor is in the rear center top of the motor. Timing belt on or off does not affect access. Second question is yes it does affect it. The ECU will slightly retard ignition timing to keep things safe. You will lose power.128 posts · Joined 2008. #1 · Apr 11, 2010 (Edited) knock sensor replacement, quest to find source of knock/ping. I've had bad gas mileage for a while now combined with ping/knock accelerating uphills, and scanned the ECU and got the p0325 code. So I changed the knock sensor, and the MPG is already reading higher, and the car running 'different'.If and only if the codes reappear then i do further research for the culprit device or circuit. SOURCE: engine code p0340. replaced distributor. SOURCE: 2002 Nissan Frontier timing belt. SOURCE: 2002 pt cruiser Camshaft Sensor. SOURCE: 3 codes present on my 2002 Envoy. p0172, p0420, and p0340, 2002 nissan frontier knock sensor location, Jun 1, 2023 · This knowledge will save thousands of dollars in a repair. It’s very common to these vehicles. Nissan VG33e v6 dreaded knock sensor p0325 code due to a fa... , Jul 6, 2009 · If I'm not mistaken, the KS on a 4 cylinder is located behind the exhaust manifold, much more forgiving a job to change than the 6. Like. fronty2wd. 667 posts · Joined 2007. #6 · Jul 7, 2009. If you havn't already post this up in the 4 banger thread as those guys might see it and know the best route to take. , The same guy who determined the knock sensor location designed the coolant hose location 😰. There's your joke, hope it helped... Seriously, I've said this before, some sadists at Nissan shoehorned the VG33 into these trucks. But hey, the knock sensor and coolant hose both make the #6 spark plug look easy 👍, The knock sensor location is going to vary depending on what year and engine your Nissan Frontier has. They are typically located in the intake manifold or directly below it screwed into the block. Most knock sensors are easy to get to., Camshaft sensor location of 2002 Nissan frontier? where is the cam sensor on 2002 Nissan frontier 3.3 v6. ... What gaskets are needed to replace the knock sensor on a Nissan Frontier?, The only code even close to that is P0325 which is the knock sensor code. The knock sensor detects pre-ignition or pinging and retards the timing via electronic signal to your computer. The ugly part about the knock sensor is where it is located. The whole intake system must be removed in order to replace it., Nissan dealership sucks. Had $600 of work new rotors and pads put on and then the abs light started coming on. Took it in and then they said it was getting the G code and would cost about $1,000 with parts and labor. I didn't get it done of course. Now the damn ABS engages when doing normal braking., And since the KS has to be relocated, you have to find a place to secure it. The KS is originally attached to a harness. You need to reattach the KS to the harness before securing it someplace else. The KS also needs to be grounded. So you will need another wire and crimp 2 terminals on each end of it., If and only if the codes reappear then i do further research for the culprit device or circuit. SOURCE: engine code p0340. replaced distributor. SOURCE: 2002 Nissan Frontier timing belt. SOURCE: 2002 pt cruiser Camshaft Sensor. SOURCE: 3 codes present on my 2002 Envoy. p0172, p0420, and p0340,, I recently picked up a knock sensor for a Nissan Frontier at Pep boys for $117.00, so they are a good place to go to get parts. Now if you want them to replace it be prepared to shell out $400.00 and wait for about 4 hours. They have to remove the intake manifold to get to the sensor. Hope this helps ya., A failed knock sensor will register a trouble code and illuminate the Check Engine lamp (CEL), although some engines will require multiple failure cycles before storing a code. Misfire. Vibration, especially at highway speed. Thumping or knocking noise from the engine. Poor fuel economy and acceleration., Where is the knock sensor located on the engine (2002 Nissan Frontier, supercharged)? One person told me it was under the manifold. Another said it was on the passenger side of the engine. The engine compartment is somewhat tight, so it's alot of work to go to both areas. Also, I removed one of the heat shields (passenger side) and saw my ... , Depending on the model, engine size and transmission, the 2015 Nissan Frontier has a towing capacity between 3,500 and 6,500 pounds. The SV V6 King Cab 4×2 and Desert Runner V6 mod..., The knock sensor on a supercharged truck is very inportant for good fuel mileage and power, it will shut down boost and drop mileage if bad , the parts is around $200.00 and 4.0 hrs. labor so around $600.00 to replace the sensor it located under intake manifold it will help the power and better fuel mileage if replaced., The knock sensor plays a crucial role in the overall performance and health of an engine. It detects any knocking or pinging sounds that may occur within the engine, which are ofte..., COMO EVITAR UN TRABAJO EN EL FUTURO DE FORMA RÁPIDA Y MUY CENSILLO ESO FUNCIONA EN TOTDOS LOS MOTORES NISSAN QUEST FRONTIER ARMADAS Y PATHFINDER MAXIMA, The Nissan Frontier is a small pickup truck that debuted in the US in 1998 and offers a lot of value for your money. ... “I have a 2002 sc 4×4 fronty. automatic. Knock sensor is without a doubt bad, all signs that people are saying are 100 percent happening to me. Car is a dog on the highway. no power. service engine soon light is up, 88 ..., The forthcoming Chevy Bolt and expected improvements in the Nissan Leaf will provide electric car owners with greatly increased driving range at affordable prices. By clicking "TRY..., Nissan Mechanic: eric. Hi, It is located at the top rear of engine block underneath the intake manifold, in the engine valley: eric. Category: Nissan. Satisfied Customers: 60,361. Experience: Automotive Repair Shop Manager, Technician/JA Mentor. Verified., Relocating the knock sensor on a 1999 Nissan Pathfinder with the 3.3 Liter V6, Another location on the block is probably close to as good as the original spot, maybe. I'm going to get pricing from a local dealer for the factory replacement, and also from a local independent. ... Hi guys i recently did the knock sensor replacement in my nissan frontier 2002 , and is really easy , see pictures attached, it took me like 1hr ..., Another location on the block is probably close to as good as the original spot, maybe. I'm going to get pricing from a local dealer for the factory replacement, and also from a local independent. ... Hi guys i recently did the knock sensor replacement in my nissan frontier 2002 , and is really easy , see pictures attached, it took me like 1hr ..., HKYStormFront. 17617 posts · Joined 2006. #5 · Jan 29, 2007. knock sensor detects detonation which is when the fuel/air mix is firing before it is supposed to (usually right after TDC of that cylinder). if your knock sensor is fouled (could see that, they are very sensitive) you should plan to get it replaced sometime. if it's not "knocking ..., 7 MAP Sensors found. View related parts. Nissan Frontier Evap Control System Pressure Sensor. Part Number: 22365-AM60A. Vehicle Specific. $183.01 MSRP: $252.08. You Save: $ 69.07 ( 28%) Check the fit. Add to Cart., If you’re experiencing issues with your car’s speedometer or noticing erratic behavior in your vehicle’s transmission, it could be due to a faulty speed sensor. Before we dive into..., Procedure. Park the Nissan Quest and open the hood. Disconnect the negative battery terminal. Locate the oxygen sensor on your Nissan. Here is the location of the upstream O2 sensor or Bank1 Sensor1 on a Nissan Quest. The downstream oxygen Bank 1 Sensor 2 sensor has to be accessed from underneath the engine. You will need …, Nissan sensor knock frontier 2002 where autocodes supercharged find location p0328 qa read circuit2003 nissan xterra knock sensor For 1999-2004 nissan frontier knock sensor smp 68781cy 2001 2000 200302 2002 nissan frontier knock sensor. 2002 nissan frontier 3.3 liter intake/knock sensor(4)2002 nissan frontier …, The replacement knock sensor located on top of the engine is not going to pick up TRUE engine knock and will probably remain very close to the "fixed" 560k ohm load resistance. In fact...the knock sensor located on top of the engine may pick up vibrations that it is not supposed to, and in turn send false variations to the on board computer, in ..., 2002 nissan frontier 3.3 liter intake/knock sensor(5)I have a 2000 nissan frontier xe with a 3.3 v6.i ran a diagnostic on it 2000 nissan frontier 6 cylinder knock sensor replacement how toNissan xterra sensor knock replacement frontier location 2004 engine pathfinder v6 valve 2001 where 1999 located 2000 2003 intake manifold., Nissan Mechanic: Jay. Hello and thank you for using JustAnswer.com. The knock sensor is part of a shielded harness. I have heard people buying Knock sensor sub harnesses for 97 Style Maxima's and tapping it the harness on the back side of the engine and putting that in and locating the knock sensor on the back of the cylinder head., The job of the knock sensor is to detect the vibrations of engine "knock" caused by an advanced ignition system. It allows the fuel mixture to run extremely lean and efficient and when it can't perform at maximum effeciency, it "knocks" like it has bad gas and the computer gets the signal from the sensor and changes the ignition to ****** the ..., The front oxygen sensors test the oxygen levels in the exhaust and report back a voltage to the ECU. The ECU takes that voltage and changes the output of gas into the cylinders. If the O2 sensor gives a lean feedback then the ECU will output a richer mixture and vise-versa. The voltage changes constantly and the more it changes within 0 - 1 ..., If I'm not mistaken, the KS on a 4 cylinder is located behind the exhaust manifold, much more forgiving a job to change than the 6. Like. fronty2wd. 667 posts · Joined 2007. #6 · Jul 7, 2009. If you havn't already post this up in the 4 banger thread as those guys might see it and know the best route to take.