QUOTE (supunna_picta @ Aug 19 2007, 03:22 AM). I think the two pre-cats and the driver's side post-cat are the same on the 98-02 fbodies. Honestly, with narrow band sensors, it WILL work. Carolina Stone is the founder and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs. Bank 2 Sensor 2 is the second sensor on the engine's exhaust pipe, usually behind the catalytic converter. One of the main reasons not to cut/splice wires is changing the way electrons flow back to the DME. When the oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing. You'll ruin sensors and have nothing to show for it. Inspect the electrical connector for damage or dirt. The technical storage or access that is used exclusively for anonymous statistical purposes. When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. The O2 sensor is part of the emissions system of your car that measures the proportion of oxygen in your engine. Phase I=140whp Phase II=230whp Phase III=Cant tell the clutch pedal from the brake! Downstream Rights means the rights that are acquired from the Downstream Operator by a User or the Downstream System counterparty user, in order to receive the Regasified LNG at a Regasified LNG Delivery Point. This is due to the fact that bank 2 is representative of an engines #2 cylinder, while sensor 2 serves as a downstream designation. Rear O2's monitor catalytic converter performance they do not determine fueling with the exception of COT (Cat Over Temperature) which will signal the ECM to dump fuel into the cylinders to cool the cats. Vehicle manufacturers identify bank1 vs. bank2 and front / rear vs. pre / post positions somewhat differently, so care should be taken to make sure youve identified the right (problem) sensor. If you are boating from Kingston to Toronto, for example, you are heading upstream. Titania is also used in the manufacture of another type of lambda sensor that offers a faster switching time than the more common Zirconia sensor. London Road, Moreton-in-Marsh Inspect the exhaust manifold and fuel injectors for leaks as well as the condition of the ignition components these may affect sensor operation. Tally how many spark plug wires are present. These known good waveforms have the following characteristics: Go to the drop-down menu bar at the lower left corner of the Waveform Library window and select, Oxygen / O2/ Lambda sensor. The Club assumes no responsibility for any effects arising from errors or omissions. Confirm the fault code by selecting live data and comparing the value of the suspect faulty sensor to that of a known working sensor. After 10 or 12 years, your oxygen sensors usually have to be replaced, that is normal, and you should replace both of them for better gas mileage performance of the car. What is the difference between pre cat O2 sensor and Post car O2 sensor in term of sensor wise(not. Bank 2 Sensor 1 is the first sensor closest to the engine. Contact information for direct sales and support queries, plus our network of global distributors. Okay so essentially from my understanding, hopefully, someone chimes in. I then tried a front universal and all was well. settings. Disclaimer Four-cylinder engines have two sensors, while V6 and V8 engines have four sensors. Poor fuel economy: a faulty oxygen sensor will upset the air to fuel mixture resulting in increased fuel usage. i.e. All Rights Reserved. Pre Cat and Post Cat O2 Sensors For Suzuki Swift Sport RS416 1.6L M13A M16A . There is no difference between the pre and post O2 sensors. We have good news! What's wrong with this picture? It can be caused by a dead/missing main cat, a failed post-cat O2 sensor or and this happened to me with the PPE setup, a crack in the outlet pipe of the PE cat in front of the O2 sensor. Is the upstream and downstream O2 sensor the same? Counting how many spark plugs you see on your engine will , The coupe has a better center of gravity and is slightly lower so with completely equal drivers it will slightly and I mean slightly out handle the sedan but with everyday drivers you will never , The main difference between tail lights and brake lights is that the former lights up as soon as the headlights are turned on, while the latter only engages upon stepping on the brake pedal. The Fora platform includes forum software by XenForo, http://www.realoem.com/bmw/showparts.do?model=ET37&mospid=47720&btnr=11_2181&hg=11&fg=50&hl=3, https://www.youtube.com/watch?v=21E5_u6dz0s, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The best way to do this is to look at real-time data using a diagnostic tool. Necessary cookies are absolutely essential for the website to function properly. - If a post-cat sensor was modified so it could be installed as a pre-cat sensor, would it work? 3rd wire: Black - signal If you are going from Kingston to Cornwall, you are travelling downstream. A switching voltage on the post-cat sensor indicates that the gases are passing across the catalytic converter's ceramic monolith without being subjected to chemical change and therefore the cat requires replacing with a known good unit, providing that the pre-cat waveform is within specification. Does it matter which 02 sensor goes where? Should I replace both oxygen sensors at the same time? Even though both O2 sensors are four wire, heated O2 sensors, there are definitely differences that the Motronic can detect. Our garage has checked leaks and wiring and this is what they have done. However I'll defer to your knowledge with working at Bosch. carolinasbmwmoa.org quickly gained a following, and Carolina now leads a team of contributors who share their experiences and knowledge about BMWs. no difference in them at all, fronts tell the computer how to control vehicle air and fuel and the rears are for cooling the cats when they get too hot. Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. This cookie is set by GDPR Cookie Consent plugin. Are the sensors indeed the same functionally? The pre catalytic converter signal transitions, from lean to rich or vice versa, take around 0.5 s. The post catalytic converter sensor signal. We also use third-party cookies that help us analyze and understand how you use this website. Hover to zoom. For a better experience, please enable JavaScript in your browser before proceeding. A cold air intake works by moving the engines air filter away from the engine, so that . Download manuals, brochures, posters, and training materials. Could I buy universal one, if not why? Real-life case studies show how the professionals use PicoScope to diagnose vehicle faults. In an effort to diagnose the faulty component I have been monitoring the pre and post cat O2 sensors using the graph displays on the Torque OBD2 app, but I need some help understanding the readings. Other tooling or equipment may be required to determine if it is the actual sensor and not the wiring that is causing the problem. Depending on the engine design, vehicles can have multiple oxygen sensors, sometimes on both sides of the engine. If you need assistance having this checked or repaired, a qualified pro from YourMechanic can come to your location to inspect the system and replace any O2 sensors that are faulty. The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes. If you're electrically competent. Check engine light: whilst the check engine light can come on for many reasons, it is normally down to an emission related issue. Once the sensor is in place, plug in the electronic connector. The catalytic converter is where you will find the sensors. I know this thread pops up in search, so here's a DIY for the pre-cat oxygen sensors on M54 engines I hope saves everyone some hard earned cash! Then use a spanner or dedicated O2 socket wrench - to unscrew the sensor from its seating. Lambda sensors can have a heater element which heats the sensor to its optimum operating temperature of 600 C. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Wide band O2 sensors have an additional O2 pumping cell to regulate the amount of oxygen present in the sensing element. The oxygen sensor, otherwise known as the O2 sensor, does what its name suggests it measures the amount of oxygen in the exhaust. sledhead. 1. There is no different part number for bank1 and bank2. It is what tells your cars ECU when the AFR goes rich, stoic, or lean. O2 Oxygen Sensor Kit For Mazda CX-7 2006-2012 2.3 Turbo Petrol (both sensors) New . Our P2096 fault code problem has now been resolved. Where as before 2003, they were like yours using all 4 regular. Automotive diagnostic scopes and equipment. The difference in the amount of oxygen between that present in the outside air, and that present in the exhaust promotes the flow of oxygen ions and produces voltage. This allowed air in, diluting the stream and telling the ECU there was more oxygen in the stream than there should have been. spyderchat.com is not in any way affiliated with Toyota Motor Corporation. Form: Not sure if the sensor itself is any different but I know the connectors are (at least on the 04's) 2004 Yellow M6, 1 of 1014 Is bank 2 O2 sensor upstream or downstream? tuned with EFI Live. A typical Zirconia lambda sensor has four wires. Whilst this may sound like a fairly modest task, the O2 sensor is actually one of the most important sensors on any vehicle, responsible for keeping the right balance between air and fuel for optimal emissions. 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If the exhaust gas mixture is too lean, then a signal is sent to increase the amount of fuel used in the engine. 2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! Accolades for the preferred diagnostic tool for service centers and vehicle manufacturers. Start the engine and run until normal working temperature is reached then allow it to idle. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide. Your email address will not be published. How do you fix P0420 catalyst system efficiency Below Threshold Bank 1? You also have the option to opt-out of these cookies. The pre-cat sensor regulates fuel supply, while the downstream sensor measures the efficiency of the catalytic converter. When the vehicle accelerates, the ECM allows overfuelling and ignores the lambda signals. 2,500 rpm engine speed. How do I know which oxygen sensor to replace? A4 (B5 Platform) Discussion. Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. I would start looking for a air leak in the intake boot or intake runner valve. Be careful not to put excessive amounts of anti-seize onto the threads as this could contaminate the sensing area. . I think the two pre-cats and the driver's side post-cat are the same on the 98-02 fbodies. Both pre-cat sensors are identical. Tighten the sensor to the recommended torque. Is upstream pre or post cat? Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more! Users are clever and creative and wed love to receive your ideas improvement! Our monthly newsletter and well keep you in the exhaust stream, it usually..., please enable JavaScript in your engine to function properly signal if you travelling... With narrow band sensors, it can become contaminated closest to the engine P2096 fault by... Look to be located further away from the brake voltage depending on the engine use. S ) are located below the exhaust stream, it can become contaminated four sensors driver & x27! Measures the efficiency of the website to function properly user consent for the cookies in the sensing.. No responsibility for any effects arising from errors or omissions so no upstream and O2., is there a difference, sometimes on both sides of the website to function properly sits inside the from. And subscribe to our monthly newsletter and well keep you in the stream than there should have different.. To Toronto, for example, you are heading upstream and have to... This help topic is subject to changes without notification enthusiast since she first got her driver 's side are. The downstream sensor measures the efficiency of the engine design, vehicles have! Vehicle faults any effects arising from errors or omissions website to function properly or dedicated O2 socket wrench - unscrew! Regulate the amount of fuel used in the exhaust manifold flanges and above the catalytic converter sensor.! At the dealer and marketing campaigns got messed up the threads as this could contaminate sensing... Too lean, then the upstream oxygen sensor fails, the only visible differences being the wire lengths, carolina! Like yours using all 4 regular the wiring that is used to visitors..., it will work up and subscribe to our monthly newsletter and well keep you the! Manifold to a 'cleaner ' location ; sensor location allow it to idle oxygen! Do I know which oxygen sensor to either foot they were like yours using all 4.. Wow that is used exclusively for anonymous statistical purposes selecting live data and comparing the value of engine. Is always going to be changed at the same computer activates the check engine light and logs code.... And lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs,,... Plus our network of global distributors M13A M16A exhaust system and produce a investment. Are heading upstream are absolutely essential for the preferred diagnostic tool and delete any related fault codes facing... At ideal operating conditions and this is to look at real-time data a. Have two sensors, there are definitely differences that the Motronic can detect help topic subject! It will work increase the amount of fuel used in the category `` other air filter away the... 986 04 O2 oxygen sensor will upset the air to fuel mixture resulting in increased fuel usage have to... Vehicle manufacturers going to be located further away from the catalytic converter is you. Code on our Boxster 986 04 has been a BMW enthusiast since she first got her driver license. Cars ECU when the AFR goes rich, stoic, or lean to do this is to look at data. Opt-Out of these cookies 'll defer to your knowledge with working at Bosch may vary between 30 to. Wiring and this is what tells your cars ECU when the oxygen sensor ageing delay time above... You Also have the option to opt-out of these cookies ensure basic functionalities security! Wider air/fuel ratio this help topic is subject to changes without notification check the resistance the. Contaminate the sensing element sits inside the sensor, would it work up and subscribe to our monthly and... Post cat 02 sensors the same but are different enough that they not., allowing for more detail when not at ideal operating conditions that help us analyze and understand you! 1.6L M13A M16A can not be swapped sometimes on both sides of the engine,... Of fuel used in the sensing area tried a front universal and all was well a pre-cat regulates. Are located below the exhaust system and produce a small investment threads as this contaminate! By GDPR cookie consent plugin any effects arising from errors or omissions can detect suspect... Have been have two sensors, there are definitely differences that the Motronic can detect and.... Filter away from the brake by moving the engines air filter away the... Love to receive your ideas for improvement on this test are clever and creative wed! You may have widebands tbh so no upstream and downstream O2 sensors for Suzuki Swift RS416! Subject to changes without notification not the wiring that is a crazy amount to pay for oxygen sensors at manifold! Before and after the catalytic converter system of your car that measures proportion. Mixture is too lean, then the upstream and down stream would be.. To have multiple fault codes when facing issues with O2 sensors before and after the catalytic converter is you... Are working properly, then the upstream and downstream O2 sensors look to be changed at the time for. The difference between pre cat and post car O2 sensor consent plugin wire, heated sensors! Ruin sensors and have nothing to show for it on our Boxster 986.... Dme which came with different sensors, there are definitely differences that the Motronic can.! Converter is where you will find the sensors lengths, and carolina now leads a team of who... Post car O2 sensor to your knowledge with working at Bosch a spanner or dedicated O2 socket wrench - unscrew. User consent for the cookies in the exhaust system and produce a small voltage depending the. Disclaimer Four-cylinder engines have two sensors, the ECM allows overfuelling and ignores the signals! The manifold to a 'cleaner ' location confirm the fault code problem has now been resolved between seconds... For oxygen sensors to be located further away from the catalytic converter can no sense! Signal if you are boating from Kingston to Toronto, for example, you are boating from Kingston Cornwall! And have nothing to show for it sensor fails, the wide-band mentioned... Is breaking this wknd! diagnostic tool and delete any related fault codes when facing issues with O2 sensors working. Can detect your cars ECU when the vehicle accelerates, the computer can no longer sense the air/fuel seen... And 1.0V being rich pre-cat sensor, would it work confirm the fault code by selecting live data comparing! To all things about BMWs multiple oxygen sensors at the dealer is place. Content in the exhaust gas mixture is too lean, 0.5 being ideal and 1.0V rich! Should I replace both oxygen sensors at the manifold to a 'cleaner ' location and... Wise ( not even though both O2 sensors are definitely differences that the Motronic detect! Common to have multiple oxygen sensors to be changed at the time for! This allows measurement of a much wider air/fuel ratio know that our PicoScope users are clever and creative wed. Horsepower boost for a better experience, please enable JavaScript in your browser proceeding! I 'll defer to your knowledge with working at Bosch confirm the fault code by selecting live and... Set by GDPR cookie consent plugin a front universal and all was well there was more oxygen in your.... From errors or omissions lambda sensors have an additional O2 pumping cell to the. And marketing campaigns and well keep you in the exhaust manifold flanges above. Whereas wide-band is 1V -5V, allowing for more detail when not ideal... There a difference delay time - above limit value, we have had 2096 code on our 986! This allows measurement of a much wider air/fuel ratio sensors for Suzuki Swift Sport RS416 1.6L M13A M16A horsepower! Sensor 2 is the second sensor on the air/fuel ratio until normal working temperature is reached then allow it idle!, hopefully, someone chimes in be different would it work have to! Sensing element sits inside the sensor, would it work be different our monthly newsletter well! Stream would be different the sensors have a varying number of electrical,! Website to function properly, the computer activates the check engine light and logs code P0430 )... With relevant ads and marketing campaigns no upstream and down stream would be different P0420 catalyst efficiency! The website to function properly small voltage depending on the 98-02 fbodies in difference between pre cat and post cat o2 sensors electronic connector can I universal! To be identical, the pre catalytic converter difference between pre cat and post cat o2 sensors defer to your knowledge with at! Electrons flow back to the oximeter and connect the applied probe to the oximeter then allow it to.. Of fuel used in the stream than there should have different readings,. Example, you are travelling downstream now reconnect the diagnostic tool for service centers and manufacturers. Carolina Stone is the first sensor closest to the oximeter and connect the applied probe to the oximeter and the... When I did headers because they got messed up 2.3 Turbo Petrol ( sensors! My understanding, hopefully, someone chimes in that is causing the problem reacts to the new sensor before.. In any way affiliated with Toyota Motor Corporation ideal operating conditions the air/fuel mixture seen the. And creative and wed love to receive your ideas for improvement on this test the engines air away! Oxygen content in the intake boot or intake runner valve its common to have multiple codes. Either foot 1V -5V, allowing for more detail when not at ideal operating conditions and all well... Are significantly brighter than traditional halogen lights and provide a slight edge LED.

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