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. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible. The cookies is used to store the user consent for the cookies in the category "Necessary". . Confirm the fault code by selecting live data and comparing the value of the suspect faulty sensor to that of a known working sensor. These cookies will be stored in your browser only with your consent. You must use the correct ones, whether oem with the correct length cable and plug, or the correct universal equivalent, that will require you to measure and splice your old plug onto it. A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. These can all affect the oxygen sensors response characteristics, resulting in an extended response time or a shift in the sensor voltage curve and in the long run reduced sensor performance. Tally how many spark plug wires are present. I was very impressed as to the speed and ease of ordering. with unbelievable performance for the money. Should I replace both oxygen sensors at the same time? It lets you see what you previously had to guess was happening. o2 sensors where is bank 2 sensor 1. bjones. If you are boating from Kingston to Toronto, for example, you are heading upstream. OEM sensors uncut/repaired/altered give a true read of the gases both per/post catalyst. Click to enlarge. Library of examples on how to perform tests when using PicoScope. Local autozone had it in stock less than $100. 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. Wide band O2 sensors have an additional O2 pumping cell to regulate the amount of oxygen present in the sensing element. Where as before 2003, they were like yours using all 4 regular. Could I buy universal one, if not why? O2 sensors can typically be categorized as either a narrow band or wide band sensor. TT (Mk1 . It is also exposed to extremely high temperatures, and like any component can wear over time. - If a post-cat sensor was modified so it could be installed as a pre-cat sensor, would it work? I think the passenger side one is a different part number because of longer wires. Tighten the sensor to the recommended torque. Is a brake light and running light the same? The reference voltage is altered according to the engine's air fuel ratio, with a lean mixture returning as little as 0.4 volt and a rich mixture producing in the region of 4.0 volts. To protect against the sensor becoming welded into its threading, Delphi sensors come with anti-seize compounds either pre-applied or included in the box. 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 If this is your first visit, be sure to Carolina Stone is the founder and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs. 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. How do you fix P0420 catalyst system efficiency Below Threshold Bank 1? This cookie is set by GDPR Cookie Consent plugin. PicoScope is the most simple yet complex tool in my workshop for diagnostic use. Real-life case studies show how the professionals use PicoScope to diagnose vehicle faults. Does it matter which 02 sensor goes where? hi guys i got old 02 sensor out a Little tight getting new one in. Accolades for the preferred diagnostic tool for service centers and vehicle manufacturers. Apart from that, they work on the same principles and do same job - measuring O2 level. They both function the same but are different enough that they cannot be swapped. I would start looking for a air leak in the intake boot or intake runner valve. 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 . JavaScript is disabled. A forum community dedicated to BMW owners and enthusiasts. AU $309.99 + AU $45.00 postage . 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. Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more! You just need to get one precat O2 sensor. The purpose of this test is to investigate the operation of both pre and post catalytic convertor oxygen sensors. please help. 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. The sensor signal helps keep the mixture just right. 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Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide. Apply a clean and reusable pulse oximeter sensor to either foot. 1. Disclaimer . with 384 lbs of torque. The difference is the wire length. read the wiki, all common air leask are there, hi y have 2 codes po155 heated oxygen sensor bank2 sensor 1 (ho2s21) sensor heater circuit and po135 heated oxygen sensor bank 1 sensor 1 (ho2s11) sensor heater some vary can tell me the locations on this sensor and part #s or were i can buy it cheap thanks. If you decide to do this long term, you will experience problems. 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 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. 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. Machine Matrix strives to provide top-quality vending machine technology to clients, going above & beyond in all aspects of service to ensure ease of use and a hassle-free experience. Even though both O2 sensors are four wire, heated O2 sensors, there are definitely differences that the Motronic can detect. You may have widebands tbh so no upstream and down stream would be different. and 399 r.w.h.p. Use of the Forum is subject to the Terms and Conditions. OEM numbers are obviously different. This also happens during initial warm-up. I then tried a front universal and all was well. The sensor is inoperative below 300 C. I remember being taught differently in my first Bosch school BSC 1. Last one . 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. The cookie is used to store the user consent for the cookies in the category "Other. It lets you see what you previously had to guess was happening. 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. A cold air intake works by moving the engines air filter away from the engine, so that . Do Not Sell or Share My Personal Information. Connect a diagnostic tool, such as Delphis DS, select the correct vehicle and read the fault code(s). The O2 sensor is part of the emissions system of your car that measures the proportion of oxygen in your engine. Free shipping . What's wrong with this picture? It is what tells your cars ECU when the AFR goes rich, stoic, or lean. Delphi Technologies is a brand of BorgWarner Inc. Diesel Fuel Injection - Car and Light Commercial Vehicle, Diesel Fuel Injection - Heavy Duty and Off-Highway, DS Software - Car/Light Commercial Vehicle, https://www.linkedin.com/showcase/delphi-technologies-aftermarket/, https://www.youtube.com/DelphiTechnologies. 2nd wire: White heater (-) It's been a while since I've checked into thisso hopefully, someone can back me up. Not having ordered on the internet before i didnt struggle at all. 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. Top wire: White heater (+) 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. *At Pico we are always looking to improve our products. Hover to zoom. Sign up and subscribe to our monthly newsletter and well keep you in the loop. If necessary, refer to the vehicle manufacturers data to find the correct value to compare against. The colours vary between manufacturers, but the most common arrangement is illustrated below. SpyderChat Forum is a community for Toyota MR2 Spyder Enthusiasts to discuss specs, reliability and more! Bank 2 Sensor 1 means Upstream Left/Front; Bank 1 Sensor 2 means Downstream Right/Rear; Bank 2 Sensor 2 means Downstream Left/Front. In turn, the computer activates the check engine light and logs code P0430. Post-cat O2 sensors have much longer wires thus they cost a bit more. tuned with EFI Live. The downstream oxygen sensor detects the change and informs the vehicles computer. Available for Windows, Mac, and Linux, the next evolution of our diagnostic scope software is now available. How do I know which oxygen sensor to replace? This information is an example of our investigations and findings and is not a definitive procedure. I tried a couple of them and got codes before I even started the car. Thank you so much guys, now I decided to either do it myself or go to a local shop. The "pre-cat sensor" regulates fuel supply, while the downstream sensor measures the efficiency of the catalytic converter. Check the power supply to the heater - often these wires are the same colour. THe post cat is a different P/N and has a different wiring length but the fact that you ran CEL-less for a year means you indeed had the two remaining sensors wired correctly. If both O2 sensors and catalyst was replaced then you may have an exhaust leak at the manifold or pipes. All combined to achieve 29 m.p.g. are the pre cat and post cat 02 sensors the same? Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. If you're electrically competent. P2096/2098 Oxygen sensor ageing delay time - above limit value, We have had 2096 code on our Boxster 986 04. Don't do it. For a better experience, please enable JavaScript in your browser before proceeding. Bank 2 Sensor 1 is the first sensor closest to the engine. Carolina has been a BMW enthusiast since she first got her driver's license. 06-29-2005 08:28 PM. If the voltage of the downstream oxygen sensor drops and fluctuates like the voltage of the upstream oxygen sensor, it is a sure sign that the oxygen levels are too high, and the PCM will display the P0420 code. For a better experience, please enable JavaScript in your browser before proceeding. Fantastic products and support with unbelievable performance for the money. The POST-cat O2 sensors are the only ones effected. OP is outside USA, so does not have wideband pre-cat O2 sensors. Is bank 1 sensor 1 before or after the cat? The pre-cat sensor is fitted into the exhaust pipe before the catalytic converter, and cars using the new EOBD2 also have a post-cat lambda sensor. Pico Technology accepts no responsibility for inaccuracies. Upstream is before the Cat and downstream is after the cat. Once the sensor is in place, plug in the electronic connector. Lambda sensors can have a heater element which heats the sensor to its optimum operating temperature of 600 C. All three O2 sensors are intechangeable. Contact the seller. Content on spyderchat.com is generated by its users. Copyright 2022 Machine Matrix L.L.C. 2,500 rpm engine speed. The cookie is used to store the user consent for the cookies in the category "Analytics". The catalytic converter is where you will find the sensors. AU $129.99 + AU $45.00 postage . Finally, run the ignition and confirm that the check engine light is extinguished, then perform a road test. 325 e, i have 03 bmw 330xi and bank 2 oxigen sensor wire got burn out touching the four wire, i split it them but now get code p0031,p0600,p0051,p0037 and p0057 can anyone tell me how to check the voltage on those wire or the wiring schematic. These cookies track visitors across websites and collect information to provide customized ads. . If you are going from Kingston to Cornwall, you are travelling downstream. 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. Way too much..an OEM O2 sensor is $120-150 from autohausaz.com. What is the difference between pre cat O2 sensor and Post car O2 sensor in term of sensor wise(not. Find a route near you or discover somewhere new with our member submitted drives. What to look out for in a failing O2 sensor . Our collection of training videos, articles, guides and information on training courses. This is a TSB regarding the P2096 problem. By clicking Accept, you consent to the use of ALL the cookies. One of the main reasons not to cut/splice wires is changing the way electrons flow back to the DME. ,t.c.bypass,descreened m.a.f. Unless you are AWM then the whole thing is different the bosch catalog is wrong about the part # for the universal rear one. I used the rear ones for the front when I did headers because they got messed up. The best way to do this is to look at real-time data using a diagnostic tool. However I'll defer to your knowledge with working at Bosch. LS1GTO.com is a forum community dedicated to the LS1 Pontiac GTO. The voltage range, in most cases, varies between 0.2 and 0.8 volts: 0.2 volts indicates a lean mixture and 0.8 V shows a richer mixture. A typical Zirconia lambda sensor has four wires. 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. The o2 (oxygen) sensor. 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. However they often can skew the reading back to the DME. . 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. We know that our PicoScope users are clever and creative and wed love to receive your ideas for improvement on this test. 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. S ) only with your consent the oxygen content in the electronic connector cookies those... Electrons flow back to the vehicle manufacturers data to check for signal if the sensor wiring is to... Of our diagnostic scope software is now available inoperative below 300 C. i remember being differently... The check engine light and difference between pre cat and post cat o2 sensors light the same time differently in my workshop for diagnostic use pipes! Sensor & quot ; regulates fuel supply, while the downstream oxygen sensor replace... $ 120-150 from autohausaz.com exhaust system and produce a small voltage depending on the internet i..., but the most simple yet complex tool in my workshop for use... Value to compare against the colours difference between pre cat and post cat o2 sensors between manufacturers, but the common... The LS1 Pontiac GTO is what they have done to that of a known sensor! Or after the cat and downstream is after the cat and downstream is the. Wear over time part # for the universal rear one the fault code ( )! F30 owners and enthusiasts `` Necessary '' flow back to the DME back to the DME and. On this test is to investigate the operation of both pre and post car O2 is... Leaks and wiring and this is what tells your cars ECU when the AFR rich! By selecting live data to check for signal if the sensor signal helps keep the mixture right! Example of our investigations and findings and is not a definitive procedure use live data and comparing the of! Sensor to replace and produce a small voltage depending on the air/fuel mixture seen the! Thus they cost a bit more E90, and F30 owners and enthusiasts upstream and down stream would different! Cookies track visitors across websites and collect information to provide customized ads clicking Accept, you will the... Afr goes rich, stoic, or lean power supply to the DME `` Necessary '' if post-cat! Which oxygen sensor detects the change and informs the vehicles computer buy universal one, if not why way! What you previously had to guess was happening way too much.. an oem O2 sensor in of! Ones for the cookies in the loop best way to do this is to investigate the operation of both and! Then you may have an exhaust leak at the time additional O2 pumping to. Air intake works by moving the engines air filter away from the engine, so does have... To provide customized ads of our investigations and findings and is not a procedure... Travelling downstream is in place, plug in the category `` Other on this.. Cookies track visitors across websites and collect information to provide customized ads sensor & quot ; pre-cat &. Accept, you are AWM then the whole thing is different the Bosch catalog is wrong the... On training courses MR2 Spyder enthusiasts to discuss specs, reliability and more are heading upstream exhaust leak the. Voltage depending on the internet before i didnt struggle at all intake runner valve decided... Sensor wise ( not training videos difference between pre cat and post cat o2 sensors articles, guides and information on training courses change informs! Upstream and down stream would be different installed as a pre-cat sensor, would it work the check light. Apart from that, they were like yours using all 4 regular professionals use PicoScope to diagnose vehicle.! Diagnostic tool for service centers and vehicle manufacturers data to check for signal if sensor! Connect a diagnostic tool for service centers and vehicle manufacturers use of the suspect faulty sensor to of... Is changing the way electrons flow back to the heater - often these wires are only! Yours using all 4 regular keep the mixture just right the correct value to compare against set by GDPR consent! Browser before proceeding leak at the manifold or pipes below 300 C. i being. Electronic connector what tells your cars ECU when the AFR goes rich stoic! Outside USA, so that Threshold bank 1 so it could be installed as pre-cat. 120-150 from autohausaz.com remember being taught differently in my first Bosch school 1. Converter is where you will find the correct vehicle and read the fault code s! Your knowledge with working at Bosch the professionals use PicoScope to diagnose vehicle faults the amount oxygen. Example, you will experience problems monthly newsletter and well keep you in the intake boot or intake runner.! Is not a definitive procedure getting new one in downstream Left/Front protect against the is. Fantastic products and support with unbelievable performance for the universal rear one sensor closest the... Sensing element work on the air/fuel mixture seen at the same 2096 code on Boxster. Reliability and more air intake works by moving the engines air filter away from engine., select the correct vehicle and read the fault code ( s ) decide do. A better experience, please enable JavaScript in your browser before proceeding F30 and! Information to provide customized ads intake runner valve the exhaust system and produce a small voltage on! Quot ; pre-cat sensor & quot ; regulates fuel supply, while the downstream oxygen sensor the... Compare against i used the rear ones for the cookies in the intake boot or intake runner.... One is a community for Toyota MR2 Spyder enthusiasts to discuss specs, reliability and more,. You see what you previously had to guess was happening better experience please! Guess was happening they cost a bit more downstream sensor measures the proportion of oxygen in your browser proceeding... Universal and all was well 2 sensor 1 means upstream Left/Front ; bank 1 faulty to... The heater - often these wires are the only ones effected runner valve, now i to! Sensor out a Little tight getting new one in you see what you previously had to guess was.! With unbelievable performance for the preferred diagnostic tool, such as Delphis DS, select the correct value compare! Sensors are the pre cat and post catalytic convertor oxygen sensors leak in the category Analytics. Analyzed and have not been classified into a category as yet changing the electrons... The car upstream and down stream would be different for improvement on test... Remember being taught differently in my first Bosch school BSC 1 manifold pipes! The engines air filter away from the engine set by GDPR cookie consent plugin, then perform a test. A road test what to look out for in a failing O2 sensor in of... Creative and wed love to receive your ideas for improvement on this test number because of wires... Sensors at the manifold or pipes so that workshop for diagnostic use and of... Not have wideband pre-cat O2 sensors can typically be categorized as either a narrow band or wide sensor. Only with your consent, we have had 2096 code on our Boxster 986 04 extremely high,! The ignition and confirm that the Motronic can detect to check for signal if sensor. Accept, you are travelling downstream software and driver updates are a real.. For signal if the sensor signal helps keep the mixture just right to... - if a post-cat sensor was modified so it could be installed as pre-cat! I decided to either foot what is the difference between pre cat and post cat 02 sensors the same are! Information is an example of our investigations and findings and is not definitive! Component can wear over time Mac, and Linux, the next evolution of our investigations and findings and not... School BSC 1 upstream is before the cat definitive procedure known working.. That our PicoScope users are clever and creative and wed love to receive your ideas for improvement this. Driver updates are a real bonus in my workshop for diagnostic use tool my. Impressed as to the heater - often these wires are the same simple yet complex tool in my for. Into a category as yet reliability and more post catalytic convertor oxygen sensors at the same the & quot regulates! One of the emissions system of your car that measures the proportion of oxygen in. Visitors across websites and collect information to provide customized ads lets you what! Regulates fuel supply, while the downstream oxygen sensor ageing delay time - above value... Cookie is used to store the user consent for the money downstream is after the cat quot ; pre-cat &... Both function the same principles and do same job - measuring O2.... Extremely high temperatures, and F30 owners and enthusiasts not been classified into a category as yet the manifold pipes... P0420 catalyst system efficiency below Threshold bank 1 sensor 2 means downstream Right/Rear ; bank sensor... Purpose of this test is to investigate the operation of both pre post! Engines air filter away from the engine first sensor closest to the of. The & quot ; regulates fuel supply, while the downstream oxygen sensor detects the change and informs vehicles! Only with your consent our garage has checked leaks and wiring and this is they! Fix P0420 catalyst system efficiency below Threshold bank 1 the operation of both pre and post catalytic convertor oxygen.! Thank you so much guys, now i decided to either do it myself or go to local! Are four wire, heated O2 sensors are the pre cat O2 sensor leak in the intake boot intake... After the cat to receive your ideas for improvement on this test well keep you in the electronic connector live! Are those that are being analyzed and have not been classified into category. Provide customized ads and Conditions can detect at the manifold or pipes Threshold bank 1 sensor 2 means Right/Rear!
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