Disconnecting O2 Sensor Plug















Here we are an offer best quality for O2 Oxygen Sensor Port Plug Adapters Dual Threaded Adapter 18 to 12mm Exhaust Pipes Bungs For Harley FLSTF FATBOY Breakout Dyna Electra Glid Shopping and guarantee cheaper than other online shopping store. Ride it for 50 miles or so so the ECM gets a chance to adjust, and if you don't think it's running better, plug them back in, and forget everyone else's results. With the HO2S connected and engine running, measure the voltage with a Digital Volt-Ohmmeter (DVOM) between terminals HO2S and SIG RTN (GND) of the oxygen sensor connector. Find many great new & used options and get the best deals for Bikers Choice - 22-216 - O2 Sensor Plug, 18mm. It helps to have various shapes and sizes since they can be used to engage the tab(s), potentially freeing up your other hand for pulling the connector apart. Once the pipes get hot, the need for extra heat isn't necessary. You can either disconnect the ECU from the harness or disconnect the battery. Using an oxygen sensor socket and a torque wrench, tighten the sensor to the torque listed in your service manual. Here's how you disconnect the electrical connection to the oxygen sensor located in front of the catalytic converter: 1. : 09392-2H100) is useful when removing the heated oxygen sensor. As a first step, a car owner can look under the hood to see if there are any wires or hoses disconnected, Nielsen says. Fitting is very easy, you only need to follow the wires from the oxygen sensor to the wiring harness until you find its connector, then you disconnect it and you connect the eliminator in its place. Turn the ignition off, disconnect the O2 sensor harness connector. 18mm O2 Sensor Bung and Plug made by Speedway Motors, for as low as $13. While holding the prong in a squeezed position, pull the two halves apart. No, go to step 3. Remove the old sensor using a socket and wrench 4. When check the engine light is tripped, the engine runs in ECU Safe mode, which results in sluggish acceleration and spoiled fuel mileage. The real pain is the connector (which is located under the passenger seat). P0137-O2 SENSOR 1/2 CIRCUIT LOW. I went out to disconnect the sensor thinking that it would be easy to un-clip, but I can't get the connectors to separate. You can either disconnect the ECU from the harness or disconnect the battery. Working Skip trial 1 month free. 5 Also works on M18x1. Step 3: Remove new O2 Sensor from box Step 4: Clean the area Step 5: Put sensor in, and apply anti-seize lube to bolts Step 6: Tighten nuts back on, and tighten the sensor *firm* but not to hard. Inspect both exhaust manifolds and inspect the down tube extending out of the exhaust manifolds. Make sure that the part has the correct wiring harness to plug into the factory harness before purchasing the replacement part. The purpose of the second oxygen sensor is to help the engine ECU determine whether the catalytic converter is functional or not. Holy cow!!! Just disconnected my O2's on my 2016 CC. Step 4 - Disconnect the connectors on top of the transmission. This is, of course, with a t-stat that sticks open when it goes bad. The symptoms of a bad oxygen (O2) sensor include a check engine light, bad fuel economy, engine hesitation, increased emissions and rough idle. Perform POWERTRAIN VERIFICATION TEST VER-5-NGC. By: Tim Moore. Used For HEGO Connector When Oxygen Sensor. Take a look at our Single Channel O2 Sensor Module only (16 volt only) as well as other Racepak Data Recorders available for sale here at Jerry Bickel Race Cars. To disconnect the O2 sensor's wiring plug, I first took off the bracket holding it and a couple other wiring looms. Here we are an offer best quality for O2 Oxygen Sensor Port Plug Adapters Dual Threaded Adapter 18 to 12mm Exhaust Pipes Bungs For Harley FLSTF FATBOY Breakout Dyna Electra Glid Shopping and guarantee cheaper than other online shopping store. Remove the old sensor using a socket and wrench 4. O2 Sensor connector (male end-harness side) that is used the rear sensors for the Vortec truck and LS2 engines. meters (10 feet) of integral cable and include quick disconnect male terminated IP67 & NEMA 6P rugged field ready Q7M quick disconnect snap connector. Accurate to 0. The rear sensor bank 2 sensor 2the main harness is just beside the intake rubber tube. *(On pre-2003 models you may be required to modify the electrical plug by trimming a small piece for proper fitment) Brand new Workhorse part for 8. a Direct fit in 1 of those 2 brands should take care of the issue with the O2 sensor. Disconnect; The next video is Get YouTube without the ads. Look for the page labled “Secondary Oxygen Sensor” and follow those instructions. This kit includes a 304 stainless steel bung to allow the use of an aftermarket oxygen sensor. To remove the O2 sensors easily, everytime, buy a cheap 22mm or 7/8 box end wrench. Inside that rubber insulator boot is simply an 0. On the other side, is your bank 1 upstream O2 sensor, and your bank 1 downstream O2 sensor, and this is the one we're going to show you the procedure on. 10mm wrench is needed, and I cut the plastic tie holding the other wiring bundle to the bracket. The plug somewhere under the tank. Disconnect the batt, if it starts and runs ok, but gradually goes rich or lean, I disconnect the battery (again) and the O2 sensor and see if it then stays ok. On OBD-II vehicles, like the Chevrolet Silverado, the O2 sensor is an essential component that monitors your exhaust. To get to the connector, I removed air box, and detached the turbo intake plastic pipe. Disconnect the single-wire signal lead of the O2 sensor from the green coax (you can leave the two-pin heater plug for the sensor connected; it has nothing to do with the signal circuit). 5 Oxygen Wideband Sensor Bung Plug with 22mm Hex Head fits Bosch Type Lambda Sensor Universal Fit - Pack of 2. Locate the factory O2 sensor, which can be found on the right hand side of the bike, by following the lead from the O2 sensor in the exhaust up to the connector. Disconnect the wire connector from the O2 sensor wire connector. 2016-2019 Hyundai Sonata part # 39210-2ECC2 - Oxygen Sensor. disconnect the electrical connector from the intake camshaft position sensor (Figure 13). There is one wiring plug that pops off easily, and our O2 plug should slide off, but I had to break mine loose. Hey there! I am going to be placing a PCIII USB on my Roadliner (bone stock - 1500 miles) in the coming days However, I am reading in the installation that they recommend that I disconnect the O2 sensor so that the PCIII can operate in a wider range. Removing the actual sensor from the exhaust pipe is no problem. Unlimited Rider Oxygen Sensor O2 Sensor For Polaris GENERAL RZR 1000 2017-2018, RZR XP TURBO 16-19, RZR 170 570 900 XP 1000 16-17, SPORTSMAN 570 2015-2016, Chieftain 15-16 Replace 4016021 4013979. Shop with confidence. The O2 sensor looks like a white spark plug and has a green wire extending out of the top of it. an exhaust leak can cause an o2 sensor to read lean, or possibly a short or bare wire in the harness, or defective o2 sensor. Constructed from durable drop forged chrome vanadium steel for rigorous use. a little richer, a little leaner, a little richer, etc. TOOL: SCS service connector 070PZ-ZY30100 5. 800V My reading for Bank 1 sensor 1 (Wide Range O2) Equivalence Ratio is 1 and not changing. The closed loop circuit has a very limited operating range, which is only in effect while holding a. In this article, we will not go in-depth on what the oxygen sensor does because if you are reading this article then you probably already know. Put a new grommet in the hole in the floor to keep the water out. Disconnect and tape up wires, located on right side of block, by oil filter. Underneath this cover are two connections, the top one (circled in red) is for your front O2 sensor. Disconnect the battery. I have an extra O2 sensor for my 2001 Blazer. After connecting the vehicle to a scan tool, the technician finds it has a long-term fuel trim of +20%. I own a 2006 Dyna Super glide. This is especially useful if you are trying to manually override the air and fuel. Weld should be complete around the bung and free of all leaks. Make sure it won't touch ground inadvertently. I don't plan on disconnecting the O2 sensor permanently, just want to be educated when I take the car to the shop for A/F mixture adjustment. -The oxygen sensor is a very sensative to excessive circuit loads and circuit damage. I know the grey plus - Answered by a verified Nissan Mechanic. Disconnect oxygen sensor multiplug and insert 6 x relevant breakout leads to complete reconnection of the oxygen sensor to the vehicle harness via the breakout leads (Fig 2). 9 LSU Wideband Sensor Connector. While the O2 Sensor itself is easy to get to by jacking up the car, disconnecting it from the wiring harness is a completely different story. An exhaust gas oxygen sensor (EGO) is very useful for setting up the MegaSquirt ® EFI controller volumetric efficiency table, and while it is highly recommended, it is not essential. Disconnect the O2 sensor 2/1 harness conenctor. Vaquero / Voyager / Classic / Nomad. What the oxygen sensor assembly looks like. also, make sure you get the right one from the auto parts store. I know this was talked about at some point, but I cant find the definitive answer. to be able to operate properly. 2- Locate the sensor connector by following its wires. Get deals on automotive parts, truck parts and more. the one they had listed in the computer for my 97 Tahoe was not the one on my truck. IMPORTANT: Use anti-seize. The vehicle had repeatedly returned with a code of P0031—O2 sensor B1S1 low current flow heater circuit failure (open circuit). Take note of the oxygen sensor plugs on the top of the fuel rail cover. Code 11 indicates either a faulty sensor (resistance wise) or a bad connection (connector, harness) between the sensor and ECU terminals 3L and 4D. It is important to know how to check the ohms in your oxygen sensor. As a precaution, you can spray a penetrating oil, such as Aero Kroil, near the thread area of the oxygen sensor. Find oxygen sensor simulators for sale here online. No O2-sensor light illuminates on cluster. Constructed from durable drop forged chrome vanadium steel for rigorous use. Package Includes: 12mm o2 sensor plug; Bypass Module. You may need to gently lever the plug apart with a small screwdriver if it does not easily disconnect, however, use extra care not to damage the connector, as the connector must be reusable. Certain plastics will go brittle with age. 10mm wrench is needed, and I cut the plastic tie holding the other wiring bundle to the bracket. If you do have a failed oxygen sensor, follow these steps to replace it. Disconnect the O2 sensor and connect a voltmeter to the sensor plug. Order Oxygen Sensor Flange for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Disconnect the sensor on the Driver Side, on mine the heatshield was too close to the sensor to be able to get anything in there to push the tab let alone a hand in there do disconnect it, I used a prybar and tweeked the shield a little so I. Service Procedure [Continued] POSITION SENSOR Figure 11 – (MK) Exhaust Camshaft Position Sensor Electrical Connector POSITION SENSOR. A MAP Sensor output that causes the ECM to sense a higher than normal vacuum will cause the system to go lean. Disconnect the sensor wiring plug. Those connectors are clipped into the firewall holders, twist them slight and they will come out. Unplug pin 11 on ECU large connector to disable FI light" Does this mode gives you any more power low-down. an exhaust leak can cause an o2 sensor to read lean, or possibly a short or bare wire in the harness, or defective o2 sensor. This is especially useful if you are trying to manually override the air and fuel. This causes less oxygen to be sensed by the sensor tricking the fuel computer into thinking the air:fuel mixture is richer than it is. The 1/2 O2 sensor pinout is given on p. This demonstrates that the catalytic converter is functioning. Disconnect the O2 sensor connector and install the Bazzaz O2 stabilizer into the factory harness. 3 Ignition on, engine not running. On the bottom left, we've got the plastic connector, and near the center, the oxygen sensor itself. Install new O2 sensor. Shop with confidence. How to remove an o2 sensor NEVER Change Another O2 Sensor Until You WATCH. This sensor will no longer be used; the wires should be neatly secured away from any moving components, or the sensor. Removing the actual sensor from the exhaust pipe is no problem. Use an oxygen sensor wrench to remove oxygen sensor. Replacing an aging O2 sensor that has become sluggish can restore peak fuel efficiency, minimize exhaust emissions and prolong the life of the converter. Ford Connectors and Sockets. Universal Stainless Steel Mufflers 24 Months. Surfaces must be properly prepared. You can either disconnect the ECU from the harness or disconnect the battery. Your Nissan oxygen sensor is an integral part of your vehicle, so if it's broken, your car can't perform optimally. 5 Oxygen Wideband Sensor Bung Plug with 22mm Hex Head fits Bosch Type Lambda Sensor Universal Fit - Pack of 2. If that is not the problem, don't. Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay Connector. LTFT is around 0 sometimes even lower than that like -0. There are two halves to the electrical connector. The shop that called me also replaced the O 2 sensor. oxygen sensor on most foreign and domestic vehicles. The NTK Performance Oxygen Sensor is available for any '99 to '09 V6 owner and '99 to '04 4. Harley O2 sensors Hi, I subscribed to your site earlier in the year and find your videos really helpful. A threaded plug is included to cap off when not in use. : 09392-2H100) is useful when removing the heated oxygen sensor. Headlamp or Headlight Connectors. The heaters will cause a fast O2 sensor warmup delta when first started to get the engine into closed loop ASAP. All cars made in 1996 and after are equipped with an OBDII interface. Underneath this cover are two connections, the top one (circled in red) is for your front O2 sensor. Soldering wires will lead to early sensor failure. 2 Cayman S (bank 1, drivers side). Reading the O2 sensor’s output voltage while the engine is running (at. There is one wiring plug that pops off easily, and our O2 plug should slide off, but I had to break mine loose. The oxygen sensor (sometimes called an Expect to spend about $50 for a set of plug wires. In this article, we will not go in-depth on what the oxygen sensor does because if you are reading this article then you probably already know. If necessary, use the correct size tap to clean and repair the. If your Check Engine light is constantly trying to get your attention, one possible problem could be a bad O2 sensor. 2- Locate the sensor connector by following its wires. Unplug the O2 sensor and put a volt meter on the sensor and ground test meter lead. With your engine at an ambient temperature, pop open your hood and disconnect the O2 sensor connected to the wiring harness near the firewall of your Jeep. Place the oxygen sensor socket on the sensor and break it loose. com you have to disconnect the O2 Sensor. It appears that whenever I clear the "history" on my car, it has to re-learn O2 settings, so it runs smooth for a while. There isn't much room to work here so I found it was easier to unscrew the sensor first (which does twist the wires some) and then unclip and remove the sensor. Disconnect Detonation Sensor The Z31T ECU does not use the same signal for the detonation sensor. If you disconnect the rear sensor you'll just throw a couple of codes. Any suggestions Thanks, Alan. The O2 sensor in this car isn't the one with the red thing that you pull to release the harness connector. With the vehicle raised, locate the faulty oxygen sensor and disconnect the wiring harness connector. Press the connector and pull it away to unplug the oxygen sensor wire harness. Step 3: Remove new O2 Sensor from box Step 4: Clean the area Step 5: Put sensor in, and apply anti-seize lube to bolts Step 6: Tighten nuts back on, and tighten the sensor *firm* but not to hard. If you disconnect the front sensor, you'll run as rich as the fuel tables will allow. Step 4: Remove the oxygen sensor. For a complete wiring diagram Refer to Section 8W. I found a link on oxygen sensor removal for Sienna 2000. Note: Leave the oxygen sensor connected, and probe through the rear of the connector when connecting the volt meter. This external clean air reference is obtained by way of the oxygen sensor signal and heater wires. As a first step, a car owner can look under the hood to see if there are any wires or hoses disconnected, Nielsen says. The rear sensor bank 2 sensor 2the main harness is just beside the intake rubber tube. If you are choosing to run a leaded race fuel this kit is a must have to keep the car running correctly and save your o2 sensor from damage. Operate engine at idle. 0 volts? Yes, go to step 4. if you have a bad o2 sensor sending a lean signal to the ecu for one side of the engine, then yes is will drive the ECU to create a rich condition to compensate, fouling the spark plugs on that side. Technician B says if the exhaust has little oxygen, the voltage of the oxygen sensor will be close to 1 volt (1000 mV) and close to zero if there is high oxygen content in the exhaust. Step 4: After disconnecting the wiring harness, remove the oxygen sensor. So I put the new MAF in and the car does the same thingStalls out ! The car's check engine light is not on either. I replaced the downstream sensor with no problem. With the O2 sensor connected, the system will keep correcting the mixture i. Measure the voltage of the (K79) O2 1/1 Heater Control circuit in the Oxygen Sensor harness. Wideband sensor should be located as close as possible in the stock sensor location to ensure measured wideband AFR values correlate to factory sensors when operating in the same range. I clear the code and every time I start the car the code will appear, same as it did before I replaced the sensor. Remove the back cover from the connector by. Only disconnect if you really must. Unplug the O2 sensor and put a volt meter on the sensor and ground test meter lead. 18MM EXHAUST O2 OXYGEN SENSOR PLUG. Carefully untangle the oxygen sensor wire and its connector from the other parts around it. What the oxygen sensor assembly looks like. Skip to primary content. Disconnect the wire connector from the O2 sensor wire connector. The rear sensor bank 2 sensor 2the main harness is just beside the intake rubber tube. Make sure you disconnect to O2 sensor from the wiring harness before you start removing it. Torque to 18-20 Nm per instructions. Get Yours Today! We know our parts and products. Location of B1/S2 O2 sensor. This external clean air reference is obtained by way of the oxygen sensor signal and heater wires. 2 LSU Wideband O2 Sensor ; Bosch 4. Redline Superbikes. Thanks Hydroxyguy, Posted here in case that site accidentally gets deleted: Oxygen Sensor Modification Keman 2004 Drugs for your oxygen sensor. Can someone help me with how these two connectors disconnect from each other? The wiring harness connector that plugs into the O2 sensor seems to have some kind of tension spring release mechanism. 0 Mustangs:. Disconnect O2 Sensor. This product is used to measure the dissolved oxygen in water, to reflect the water quality. • 1995-1999 Nissan Maxima Antenna Replacement Video • Nissan VQ35DE Engine Timing Chain Tensioner and Water Pump Replacement Video • 2009-2013 Nissan Murano Spark Plugs Replacement Procedure • 2003-2006 Nissan Sentra Air/Fuel Ratio - Oxygen Sensor Location • 2002-2006 Nissan Altima Air Filter Replacement Procedure Video Tutorial. Apply anti-seize paste to the threads of the new sensor before installing it into the manifold. Service Procedure [Continued] POSITION SENSOR Figure 11 – (MK) Exhaust Camshaft Position Sensor Electrical Connector POSITION SENSOR. This external clean air reference is obtained by way of the oxygen sensor signal and heater wires. Near the top and the middle section of the wire the goes between the sensor and the plug, you will most likely encounter a couple of zip ties. Ignition off! Disconnect the multi-pin connector from the ECU. Buy Champion Platinum Power Spark from the world's best dealers. So, By monitoring oxygen levels, the sensor provides a means of measuring fuel mixture. A replacement wideband sensor that plugs into an Innovate LC-1, LM-1, or LM-2 wideband controller. Remove the oxygen sensor with the appropriate tool(s). Terminals and seals ARE included. The ECU is designed to read the Oxygen Sensor under certain conditions and temporarily change the air/fuel ratio. Please ensure the remaining O2 sensor lead if secured up and away from any. at the same time, do not try to force a heated o2 sensor into operation. With the vehicle raised, locate the faulty oxygen sensor and disconnect the wiring harness connector. At some point, the O2 sensors in your car may go out. The O2 sensor has three wires - the main sensor wire and two wires to power an internal heater. a little richer, a little leaner, a little richer, etc. Find Oxygen Sensor Plugs and get Free Shipping on Orders Over $99 at Summit Racing! JavaScript Disabled. Order ships free when this item is included and exceeds $99. Singles, pairs, & kits available in steel or stainless steel. In open loop the car doesnt use the O2 sensors anyway, so one would assume it would actually run better at WOT or open loop than closed loop where the car rely's on O2 info to control fuel to the engine. Ok, so the O2 sensor plug is near the grommet in the engine sheet metal? I'll have to go out and take a look. disconnect electrical connector and remove oxygen sensor from the vehicle. Take note of the oxygen sensor plugs on the top of the fuel rail cover. Using the oxygen sensor socket or the appropriate size open end wrench, loosen and remove the oxygen sensor. Step 4 - Disconnect the O2 sensor connector(s) Begin by disconnecting the O2 sensor wiring connectors. Hey there! I am going to be placing a PCIII USB on my Roadliner (bone stock - 1500 miles) in the coming days However, I am reading in the installation that they recommend that I disconnect the O2 sensor so that the PCIII can operate in a wider range. *Titania O2 Sensor The 86-89T ECU requires the use of a heated Titania O2 sensor. It seems an easier way to pull out bank 1 sensor 1 is to first disconnect it from under the seat. However, replacing an oxygen sensor is a job that you can do yourself, (as long as the O2 sensor is not completely rotted into the pipe or catalytic converter) thereby saving you precious time and money. Connection: Yellow/blue - Green/white 6. So, By monitoring oxygen levels, the sensor provides a means of measuring fuel mixture. This product is used to measure the dissolved oxygen in water, to reflect the water quality. com family - an authorized Bosch distributor. Since the worst case scenario for running on a bad oxygen sensor would be poor gas mileage, I was still able to drive to the nearest auto parts store to buy a new oxygen sensor. An O2 sensor is an electronic device located inside. The O2 sensors in motorcycles are designed to. 2 LSU Wideband O2 Sensor ; Bosch 4. According to the service manual, an O2 sensor that is capable of providing the ECU with the proper signal (rapidly cycling between rich and lean) and has a properly functioning heater circuit does not need to be replaced. caution: the original sensor is located in the exhaust system at hight temperature that could result in burns or other related injuries. 5 at the best online prices at eBay! Free shipping for many products!. for example, If you getting 22 on the highway, you will get 16-18 on the highway. 1 is an ecm ground which is a "low noise" ground. Each connector has 3 rows of slots for a total of 32 slots (terminals). Find oxygen sensor simulators for sale here online. I had some issues with setup in that it would stall during deceleration with a manual transmission, which was worked through and did end up seeming OK. a little richer, a little leaner, a little richer, etc. then plug it back in. 13- engine temperature circuit, open or short circuit is detected- check harness, connectors and sensor. I did this for the rear sensor but. This oxygen sensor socket removes the 7/8 in. 5 Fitting Size 1 and get Free Shipping on Orders Over $99 at Summit Racing!. The A/F heater circuit is 4 ohms, specs say around 2 ohms. Any suggestions Thanks, Alan. 6 liter owner, who's in need of a replacement for a bad front sensor in order to turn off the check engine light, and improve engine performance and exhaust flow. The easiest way to detach the sensor is by using a 3 ⁄ 8  in (0. I slid the whole unit out of the holder and then disconnected the electronics. Terminals and seals ARE included. Surfaces must be properly prepared. I'd like to get some inputs on wide-band O2 sensors for the R1150RT. O2 sensor risers: Turn off the. I replaced the downstream sensor with no problem. 9L V8 engine. To replace it is pretty simple. Can someone help me with how these two connectors disconnect from each other? The wiring harness connector that plugs into the O2 sensor seems to have some kind of tension spring release mechanism. I own a 2006 Dyna Super glide. Make sure it won't touch ground inadvertently. At some point, the O2 sensors in your car may go out. PitVisit O2 Sensor Bung Plugs Stainless Steel M18 x 1. Nissan periodic maintenance does not require replacement of the oxygen sensor according to any time or mileage schedule. Reconnect the ecm connector. Its not pressurized like a spark plug, so it doesnt need to be torqued down. Car is running rough, if you unplug the O2 sensor it smoothes out. I recently installed an OBX 4-2-1 header, purchased through eBay for $175 delivered, on my 1990 Miata (including a new single wire O2 sensor). MAP Sensor. Finally, reconnect the negative battery cable. 6V (300-600mV). Your O2 IED will still be connected to the oxygen sensor. Is there some tip to getting at this and disconnecting the connector? or is swearing and some awfully small / long arms required? I haven't even attempted to unscrew the sensor yet which is probably another fun story on a 10 year old exhaust system. The O2 sensor monitors the amount of unburned oxygen in the exhaust and produces a voltage signal that varies from about 0. Obviously, replacing the sensor was not the proper fix. How to disconnect wire harness for front o2 sensor on nisssan frontier 2001 4 cyl 2 wheel drive. Disconnect the negative battery cable. Ignition off! Disconnect the multi-pin connector from the ECU. Toyota/Lexus Connector? BMW Connector? Hyundai/Kia Connector? Subaru Connector? We have all automotive plugs, pigtails, connectors right here. the o2 sensor has to be above 600 º f. When functioning, the O2 sensor sends data to the management computer located within the engine. Soldering wires will lead to early sensor failure. Remove the connector from the bracket. 0 ohms- If yes, repair the short to ground in the O2 Sensor Heater Control circuit. After replacing the O2 sensor and you are putting everything back together, ensure you don't pinch the wire with the plate. This oxygen sensor bypass kit allows you to remove your o2 sensor without causing a check engine light. The o2 sensor on the durango has 4 wires. The plug somewhere under the tank. The strange thing is, I disconnected the oxygen sensor with the engine fully warmed up, expecting the "check engine" light to immediately come on, but it doesn't! So now, I'm wondering whether this should be the case where the light isn't coming on when my oxygen sensor is disconnected, or whether my ECU module may be flaky. Heated oxygen sensors do not last long as manufacturers claim and can either get really lazy in their output or just plain fail. Hey, had a check engine light for the upstream O2 sensor. Just pushes the o2 sensor further away from the exhaust flow so it thinks you still have a working cat. a rich running engine will cause the cats to plug. One is male; the other is female. If that is not the problem, don't. Route the EEC Harness 60-Pin Connector, the 9-Pin Connector, the Inertia Switch Connector, the Self Test Connector, and the FRCM Connector through the hole in the firewall referred to on Page 4 (Sections 5. The purpose of this thread is to discuss the modification of the O2 sensor by using spark plug non-foulers as spacers to bring the o2 sensor probe away from the exhaust gases. I know the grey plus - Answered by a verified Nissan Mechanic. Step 3 — Remove the Wiring Harness Connector. You should clear the ECU memory after disconnecting the O2 sensor, in case the ECU adaptive mixture control has been corrupted by the faulty O2 sensor. Incoming search terms: Can You Disconnect 02 Sensors,Can You Test Co2 Sensor By Disconnect,Disconnecting Battery O2 Sensor,Disconnecting O2 Sensor,Removing O2 Sensor And Driving,What Happens If You Disconnect Ox Sensor On Auto,What Happens If You Unplug 02 Sensor,What Would Happen If I Disconnect The 02 Sensor On My Land Rover. An O2 sensor is an electronic device located inside. After replacement of the heated oxygen sensor, use a scan tool to speed up learn functions. oxygen sensor on most foreign and domestic vehicles. But the main plug to the sensor remains. Getting at the drivers side sensor is not easy but with some effort can be got at ok. 95 cm) ratchet wrench fit with a 7 ⁄ 8  in (2. If you don't have the manual, buy an inexpensive, aftermarket repair manual from your local auto parts store or online. This is the end of the connector that belongs to the oxygen sensor. Disconnect the PCM harness connector. For other PCM pin-out charts, take a look at the following:. I replaced the downstream sensor with no problem. The intake air thermosensor is located on the underside of the extension manifold, which you need to remove to get at the sensor. The O2 sensor itself is a breeze to remove. O2 SENSOR TEST 1: Inducing a Rich Condition to see if Oxygen Sensor is BAD or not. It's range is between zero and 1. If necessary locate the sensor first and trace the wire up to the connector plug. 0Resto has you covered with a full selection of harnesses to ensure you don't spend all your time patching up a worn factory harness. The O2 sensor looks like a white spark plug and has a green wire extending out of the top of it. In this article, we will not go in-depth on what the oxygen sensor does because if you are reading this article then you probably already know. Electrical connectors are one of the most overlooked reasons for engine and starting problems on a car, truck, boat or anything that starts with a battery. Meaning that the o2 sensor might as well not be there, because the ECU is not using it to modify its timing and fuel maps.