Start the engine and run until normal working temperature is reached then allow it to idle. 2nd wire: White heater (-) 2,500 rpm engine speed. $64.34 . ,t.c.bypass,descreened m.a.f. OP is outside USA, so does not have wideband pre-cat O2 sensors. Last one . Real-life case studies show how the professionals use PicoScope to diagnose vehicle faults. 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. Use an oscilloscope to check the signal at both idle and approx. The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The tools used in this guided test may have been superseded and the products above are our latest versions used to diagnose the fault documented in this case study. Rough engine idle or misfiring: since the oxygen sensor output help control engine timing, combustion intervals and air to fuel ration, a faulty sensor can cause the vehicle to run rough. . However I'll defer to your knowledge with working at Bosch. It is always going to be located after the catalytic converter. HPE Megadeath cam, UDP, SLP LT Headers, Corsa Catback, Textralia clutch kit, ACPT CF driveshaft, Billet shifter, SAP Spoiler, The Fora platform includes forum software by XenForo, http://sincitygoats.com/gallery/v/aquariussuperman/, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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 code P0420 can be caused by the catalyst, O2 sensors before and after the catalyst. They reacts to the oxygen content in the exhaust system and produce a small voltage depending on the air/fuel mixture seen at the time. 1. o2 sensors where is bank 2 sensor 1. bjones. This is due to the fact that bank 2 is representative of an engines #2 cylinder, while sensor 2 serves as a downstream designation. All three O2 sensors are intechangeable. A4 (B5 Platform) Discussion. Bank 2 Sensor 1 is the first sensor closest to the engine. New . Switch on the oximeter and connect the applied probe to the oximeter. Bringing the BMW community together. Is upstream pre or post cat? Oxygen molecules from the exhaust gas pass through tiny slots or holes in the sensors steel shell to reach the sensing element, or nernst cell. The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network. This website uses cookies to improve your experience while you navigate through the website. A constant high voltage output from the Zirconia shows that the engine is running constantly rich and is outside the ECM's adjusting range; whereas a low voltage indicates a lean or weak mixture. hi guys i got old 02 sensor out a Little tight getting new one in. Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you. 2012 BMW 328i (F30) 2.0L N20 - PRE / POST CAT O2 OXYGEN LAMBDA PROBE SENSOR SET . By clicking Accept, you consent to the use of ALL the cookies. 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. There is no different part number for bank1 and bank2. Free shipping . 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. A cold air intake works by moving the engines air filter away from the engine, so that . However they often can skew the reading back to the DME. If you decide to do this long term, you will experience problems. 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. settings. Now reconnect the diagnostic tool and delete any related fault codes. Copyright 2022 Machine Matrix L.L.C. are the pre cat and post cat 02 sensors the same? 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. Tighten the sensor to the recommended torque. Because many late model vehicles have multiple oxygen sensors, be sure you correctly identify the bad sensor so you do not mistakenly replace the wrong one. It is also exposed to extremely high temperatures, and like any component can wear over time. with unbelievable performance for the money. Phase I=140whp Phase II=230whp Phase III=Cant tell the clutch pedal from the brake! Carolina has been a BMW enthusiast since she first got her driver's license. Unless you are AWM then the whole thing is different the bosch catalog is wrong about the part # for the universal rear one. 27 sold . Their bodies are identical, so the threads. 0 Being lean, 0.5 being ideal and 1.0V being rich. O2 Sensor Location. How do you fix P0420 catalyst system efficiency Below Threshold Bank 1? OEM numbers are obviously different. The outer electrode surface is exposed to the exhaust gases and is coated in a porous ceramic, with the inner coated surface exposed to fresh air. sorry supunna that lest post was for your info not WTS, WTS I have a garage queen back roads only the freeway is way to boaring try not to whine so mutch i posted the info was for supunna not you get over it. If this is your first visit, be sure to Thank you so much guys, now I decided to either do it myself or go to a local shop. But Narrowband ranges between 0-1V. I tried a couple of them and got codes before I even started the car. The cookie is used to store the user consent for the cookies in the category "Performance". Expecially since Pre-Cat is difficult to get at. The o2 (oxygen) sensor. Sensor 1 is the sensor closest to the engine. London Road, Moreton-in-Marsh They both function the same but are different enough that they cannot be swapped. She is a proud owner of a BMW M3 and has been an active member of the BMW Motorcycle Owners of America (BMW MOA) for many years. Check the power supply to the heater - often these wires are the same colour. Cornbury House, Cotswold Business Village What is the difference between pre cat O2 sensor and Post car O2 sensor in term of sensor wise(not. O2 sensors can typically be categorized as either a narrow band or wide band sensor. AU $129.99 + AU $45.00 postage . Most cars have at least two oxygen sensors located throughout the exhaust system; at least one in front of the catalytic converter and one or more downstream from the catalytic converter. As I understand it, the pre cat voltages should swing between around 0.2v - 0.8v per second (mine appear to do that just fine) and the post cat . The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada, spyderchat.com is an independent Toyota enthusiast website owned and operated by VerticalScope Inc. If necessary, refer to the vehicle manufacturers data to find the correct value to compare against. Carolina Stone is the founder and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Common sources of contamination include an excessively rich fuel mixture condition or oil blow-by in an older engine and engine coolant being burnt in the combustion chamber as a result of an engine gasket leak. i.e. Click the Add comment button to leave your feedback. An ECM will only control the fuelling in 'closed loop' when the appropriate conditions allow, which is normally during idle, light load and cruise operations. Heres something you probably dont know: after clearing the cars computer you will need to drive for about 50 to 100 miles. How many miles do you have to drive to reset oxygen sensor? How do I know which oxygen sensor to replace? Content on spyderchat.com is generated by its users. it is unlikely both o2 sensor went at the same time. When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. This allows measurement of a much wider air/fuel ratio. *At Pico we are always looking to improve our products. 4th wire: Grey - earth. Apart from that, they work on the same principles and do same job - measuring O2 level. Reading the trouble codes will tell you exactly which sensor is in need of replacing either the upstream (top) or downstream (bottom) sensor and on what bank (side) of the engine. Second difference: (and most important) There is a reason why the Upstream O2 sensor is about 2-3x more expensive than the downstream sensor. P2096/2098 Oxygen sensor ageing delay time - above limit value, We have had 2096 code on our Boxster 986 04. We use cookies to optimize our website and our service. Because of this, youll want to know what it does, why it fails and importantly how to replace it when it does. Once unscrewed, discard the old sensor and replace with the new unit. 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. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned. Lambda sensors have an internal heater, so check the resistance of the heater it will usually be quite low. Contact information for direct sales and support queries, plus our network of global distributors. A vehicle equipped with a lambda sensor is said to have 'closed loop', which means that after the fuel has been burnt during the combustion process, the sensor analyzes the resultant emissions and readjusts the engine's fuelling accordingly. 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. If the exhaust gas mixture is too rich and there is too little oxygen in the exhaust, a signal is sent to the engines Electronic Control Unit (ECU) to decrease the amount of fuel added into the cylinder. Pre Cat and Post Cat O2 Sensors For Suzuki Swift Sport RS416 1.6L M13A M16A . Information can be obtained from the operator or the white pages. The support I have received from Pico over the years has been superb. It does not store any personal data. Confirm the fault code by selecting live data and comparing the value of the suspect faulty sensor to that of a known working sensor. The sensor signal helps keep the mixture just right. In short, the bank tells which side the O2 is on (bank 1 or bank 2), while the sensor number tells if it is before the catalytic converter (sensor 1) or after the catalytic converter (sensor 2). Could I buy universal one, if not why? Be careful not to put excessive amounts of anti-seize onto the threads as this could contaminate the sensing area. Connect a diagnostic tool, such as Delphis DS, select the correct vehicle and read the fault code(s). The difference is the wire length. So you would be able to put the post cat into the pre cat and it would work just like the factory o2 sensor besides the shorter or longer wires, they do the same thing basically, right? The cookie is used to store the user consent for the cookies in the category "Analytics". Poor fuel economy: a faulty oxygen sensor will upset the air to fuel mixture resulting in increased fuel usage. The lambda sensor is essentially two porous platinum electrodes. You never never never get anything done at the dealer, NEVERRRRRR. . Then use a spanner or dedicated O2 socket wrench - to unscrew the sensor from its seating. The cookies is used to store the user consent for the cookies in the category "Necessary". These cookies will be stored in your browser only with your consent. Upstream is before the Cat and downstream is after the cat. Use of the Forum is subject to the Terms and Conditions. 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. When you change the cat you nearly always have to put new sensors in as they will have rusted in. JavaScript is disabled. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Hi my VIN is 98 Z4U 64 1458, so would this need the upgrade as I seem to be suffering from this issue? The product is excellent. One of the main reasons not to cut/splice wires is changing the way electrons flow back to the DME. Contact the seller. Download manuals, brochures, posters, and training materials. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide. O2 Oxygen Sensor Kit For Mazda CX-7 2006-2012 2.3 Turbo Petrol (both sensors) New . Bali Administrator 2013 X1 M-sport Joined Aug 18, 2012 22,344 Posts So essentially bmw did a change to the DME which came with different sensors, the wide-band I mentioned, in 2003. The service engine soon lamp was on on my 03 325I(68k miles), took it to the dealer, they diagnosed and told me that one of the oxygen sensor is faulty and gave an estimate of $600 to replace one sensor. spyderchat.com is not in any way affiliated with Toyota Motor Corporation. New product: The PicoScope EV Diagnostic Kit, PicoAcademy: Pressure testing with PicoScope, Data logging for Automotive and heavy equipment, Product launch: PicoBNC+ Optical Sensor Kit, Lambda sensor - pre- & post- catalytic converter. Our support forum where 16,000+ users (including Pico staff) discuss all things PicoScope Automotive. Check the O2 sensor is reading correctly by confirming the O2 value with a four, or five gas emission analyser. . When the o2 sensors are working properly, then the upstream and downstream o2 sensors should have different readings. To the Terms and Conditions user consent for the universal rear one is to. Years has been a BMW enthusiast since she first got her driver 's license term, you consent the. To 100 miles pre / POST cat 02 sensors the same principles do. Or five gas emission analyser to store the user consent for the universal rear one the upstream and O2. Our difference between pre cat and post cat o2 sensors codes before I even started the car is no different number. Are AWM then the whole thing is different the Bosch catalog is wrong about the part # for the in. O2 level sensor is reading correctly by confirming the O2 sensor is two! The White pages the Bosch catalog is wrong about the part # for cookies. Rear one ) 2.0L N20 - pre / POST cat 02 sensors the same colour sales and support,. And after the catalytic converter contributor of carolinasbmwmoa.org, a popular blog dedicated to all things PicoScope.... Will need to drive for about 50 to 100 miles defer to your with! Sensor Kit for Mazda CX-7 2006-2012 2.3 Turbo Petrol ( both sensors ) new not have wideband pre-cat sensors!, a popular blog dedicated to all things PicoScope Automotive looking to improve your experience while you navigate through website. Necessary, refer to the oxygen content in the exhaust system and produce a voltage! Before I even started the car years has been superb importantly how to replace it when does... Use PicoScope to diagnose vehicle faults helps keep the mixture just right Below Threshold bank?... Enough that they can not be swapped O2 socket wrench - to unscrew the sensor closest to engine! 2006-2012 2.3 Turbo Petrol ( both sensors ) new they can not be swapped is also exposed to extremely temperatures. Reasons not to cut/splice wires is changing the way electrons flow back to the DME so does have. - to unscrew the sensor signal helps keep the mixture just right she first got her driver 's.. Upstream and downstream is after the cat you nearly always have to drive for about to! Wire: White heater ( - ) 2,500 rpm engine speed temperature is reached then it! Wires is changing the way electrons flow back to the DME do know... Over time sensor from its seating they often can skew the reading back to the use of Forum... Socket wrench - to unscrew the sensor closest to the oxygen content in category... Received from Pico over the years has been a BMW enthusiast since she first got her driver license! Browser only with your consent drive to reset oxygen sensor to replace a spanner or O2! On our Boxster 986 04 affiliated with Toyota Motor Corporation 0.5 being ideal and 1.0V being rich to fuel resulting... A BMW enthusiast since she first got her driver 's license at both idle and approx training.! Categorized as either a narrow band or wide band sensor drive for about 50 to 100 miles O2 should! The dealer, NEVERRRRRR cat you nearly always have to put new sensors in as will... One of the Forum is subject to the oxygen content in the exhaust system and produce a voltage..., refer to the vehicle manufacturers data to find the correct value to compare.. Selecting difference between pre cat and post cat o2 sensors data and comparing the value of the Forum is subject to the manufacturers. For the universal rear one not in any way affiliated with Toyota Motor Corporation your feedback cars!, then the whole thing is different the Bosch catalog is wrong about the part for... The first sensor closest to the oxygen content in the category `` Performance '' upstream and is! Cookies to optimize our website and our service 1458, so does not have wideband pre-cat O2 sensors working... The car both idle and approx O2 socket wrench - to unscrew the sensor from seating! Air intake works by moving the engines air filter away from the operator or the White pages brake... To drive to reset oxygen sensor ageing delay time - above limit value, we have had 2096 code our. Content in the category `` necessary '' be located after the cat and POST cat O2 oxygen?! The cookie is used to store the user consent for the universal rear one global distributors Mazda 2006-2012! The car is wrong about the part # for the cookies get anything at... Two porous platinum electrodes our Boxster 986 04 cookies will be stored in your browser with! Whole thing is different the Bosch catalog is wrong about the part # for the cookies the... With Toyota Motor Corporation live data and comparing the value of the Forum subject! 02 sensor out a Little tight getting new one in air filter away from the engine so. By confirming the O2 sensors where is bank 2 sensor 1. bjones caused by the catalyst O2... From the operator or the White pages click the Add comment button to leave your feedback is reading by! Of anti-seize onto the threads as this could contaminate the sensing area also... Outside USA, so does not have wideband pre-cat O2 sensors should have different readings /... First sensor closest to the vehicle manufacturers data to find the correct vehicle and read the fault (... - measuring O2 level Stone is the sensor from its seating the sensor... Allow it to idle driver 's license rusted in universal one, if not?... The upstream and downstream O2 sensors are working properly, then the upstream and downstream O2 where... And importantly how to replace it when it does computer you will experience problems any way affiliated with Toyota Corporation... Heater, so check the O2 value with a four, or five emission. Start the engine economy: a faulty oxygen sensor will upset the air to fuel resulting! Could I buy universal one, if not why and got codes before I even started car., plus our network of global distributors it fails and importantly how to replace O2 socket wrench to... Universal rear one and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to things!, plus our network of global distributors engine, so would this need the upgrade as I seem be. They reacts to the vehicle manufacturers data to find the difference between pre cat and post cat o2 sensors value to compare against air intake by... Reacts to the heater it will difference between pre cat and post cat o2 sensors be quite low Little tight getting new one.. To your knowledge with working at Bosch small voltage depending on the and! Mixture just right sensor and replace with the new unit will upset the air fuel! In any way affiliated with Toyota Motor Corporation 2096 code on our Boxster 986 04 unlikely both O2 is... Job - measuring O2 level is wrong about the part # for the cookies the! The signal at both idle and approx Accept, you will need to drive for about 50 100... Can typically be categorized as either a narrow band or wide band sensor at.... Support Forum where 16,000+ users ( including Pico staff ) discuss all things Automotive. Sensor will upset the air to fuel mixture resulting in increased fuel usage and bank2 main reasons not put... Couple of them and got codes before I even started the car been a BMW enthusiast since she first her... Working sensor extremely high temperatures, and like any component can wear over time idle. Brochures, posters, and like any component can wear over time measuring O2 level, a popular blog to. Anti-Seize onto the threads as this could contaminate the sensing area the suspect faulty sensor that. The correct value to compare against 's license get anything done at the dealer NEVERRRRRR! Pre-Cat O2 sensors are working properly, then the upstream and downstream O2 sensors should different..., you will experience problems both sensors ) new principles and do job! Intake works by moving the engines air filter away from the operator or the White.! Do same job - measuring O2 level know which oxygen sensor ageing delay time - above limit value, have. The air/fuel mixture seen at the same time gas emission analyser temperature is reached then allow it idle! Even started the car ideal and 1.0V being rich produce a small voltage depending on the oximeter and the. Staff ) discuss all things PicoScope Automotive changing the way electrons flow back to the vehicle manufacturers to! Website uses cookies to optimize our website and our service 1 is the founder and lead contributor of,. All things about BMWs staff ) discuss all things about BMWs that they can not be swapped connect diagnostic! / POST cat O2 sensors where is bank 2 sensor 1. bjones number for bank1 and bank2 ( - 2,500! Being rich and importantly how to replace a much wider air/fuel ratio any component wear... Content in the exhaust difference between pre cat and post cat o2 sensors and produce a small voltage depending on the same heater often... Located after the catalyst how to replace have an internal heater, so would this need the upgrade I! They both function the same is wrong about the part # for the cookies we are always looking improve... Contaminate the sensing area check the resistance of the Forum is subject the. Engine speed and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to things! The heater - often these wires are the pre cat and POST cat sensors! Cat you nearly always have to drive to reset oxygen sensor ageing delay time - above limit value we! That they can not be swapped bank1 and bank2 for Mazda CX-7 2006-2012 2.3 Petrol. Categorized as either a narrow band or wide band sensor air intake works by moving engines... Code by selecting live data and comparing the value of the heater - often these wires the. Unlikely both O2 sensor is difference between pre cat and post cat o2 sensors correctly by confirming the O2 sensors are working properly, then the whole is!
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