QUOTE (supunna_picta @ Aug 19 2007, 03:22 AM). 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. Click to enlarge. The difference between the two is about $1,000.. Okay so essentially from my understanding, hopefully, someone chimes in. 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. Cornbury House, Cotswold Business Village
Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times. These cookies ensure basic functionalities and security features of the website, anonymously. The catalytic converter maintains the stoichiometric air-fuel ratio of 14.7:1. Do universal sensors work, well yes. Click the Add comment button to leave your feedback. Check engine light: whilst the check engine light can come on for many reasons, it is normally down to an emission related issue. Since the oxygen sensor is in the exhaust stream, it can become contaminated. Even though both O2 sensors are four wire, heated O2 sensors, there are definitely differences that the Motronic can detect. Available for Windows, Mac, and Linux, the next evolution of our diagnostic scope software is now available. That's where my misconfusion came from. OEM numbers are obviously different. 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. A4 (B5 Platform) Discussion. This website uses cookies to improve your experience while you navigate through the website. I was very impressed as to the speed and ease of ordering. The technical storage or access that is used exclusively for anonymous statistical purposes. A vehicles (bank 2, sensor 2) O2 sensor will be located behind or downstream of the catalytic converter on the bank which corresponds to the engines second cylinder. Pre- and poscat sensors have different wire length and pre-cat is male, post cat is female connectors. Sensor 2 is the downstream oxygen sensor. Content on spyderchat.com is generated by its users. The pre- and post-cat O2 sensors look to be identical, the only visible differences being the wire lengths, and connectors. functioning wise) Also, where can I buy a cheaper O2 sensor? 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. This help topic is subject to changes without notification. While , And despite their simplicity, a cold air intake actually provides a decent horsepower boost for a small investment. A typical Zirconia lambda sensor has four wires. The catalytic converter is where you will find the sensors. The code P0420 can be caused by the catalyst, O2 sensors before and after the catalyst. 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). Most oxygen sensors come with a special electrically conductive anti-seize compound applied to the threads, so its merely a matter of threading the new sensor into the void left by the old one. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Our P2096 fault code problem has now been resolved. However they often can skew the reading back to the DME. If the frequency of the switching is slower than expected, removing the sensor and cleaning it with a solvent spray may improve the response time. Tally how many spark plug wires are present. Bringing the BMW community together. Check if this part fits your vehicle. These Remove passenger side front Use the factory wire retainers i 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. We use cookies to optimize our website and our service. In turn, the computer activates the check engine light and logs code P0430. hi guys i got old 02 sensor out a Little tight getting new one in. By clicking Accept, you consent to the use of ALL the cookies. 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. Each vehicle may be different and require unique test A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Do NOT follow this link or you will be banned from the site! 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. Are Bank 1 and Bank 2 O2 sensors the same? Too little fuel produces nitrogen-oxide pollutants. Required fields are marked *. The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user. Pico Technology accepts no responsibility for inaccuracies. We have good news! Picture Information. A cold air intake works by moving the engines air filter away from the engine, so that . Is upstream pre or post cat? Are the sensors indeed the same functionally? Fantastic products and support with unbelievable performance for the money. P2096/2098 Oxygen sensor ageing delay time - above limit value, We have had 2096 code on our Boxster 986 04. 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. Bank 2 Sensor 1 is the first sensor closest to the engine. 27 sold . Can , In V6 or V8 engines, the spark plug wires are on both sides of the engine. The sensor is inoperative below 300 C. Does it matter which 02 sensor goes where? So any cars made after 2003 only used those regular ones for downstream. When you change the cat you nearly always have to put new sensors in as they will have rusted in. If the exhaust gas mixture is too lean, then a signal is sent to increase the amount of fuel used in the engine. Honestly, with narrow band sensors, it WILL work. These cookies track visitors across websites and collect information to provide customized ads. Lambda sensors have an internal heater, so check the resistance of the heater it will usually be quite low. 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. Why am I still getting a P0420 code after I replaced my catalytic converter? 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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. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. When the vehicle accelerates, the ECM allows overfuelling and ignores the lambda signals. London Road, Moreton-in-Marsh
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! How many miles do you have to drive to reset oxygen sensor? How do I know which oxygen sensor to replace? The best way to do this is to look at real-time data using a diagnostic tool. 2001 camaro z28 ss vert with factory slp upgrades, Hooker long tubes, 3"y-pipe to a 4" muffler, ,airlid,s.s.r.a. Both pre-cat sensors are identical. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". This switching can be observed on an oscilloscope or by using the low range voltage on a multimeter. 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. Carolina has been a BMW enthusiast since she first got her driver's license. This page could not be found. The pre-cat sensor regulates fuel supply, while the downstream sensor measures the efficiency of the catalytic converter. This cookie is set by GDPR Cookie Consent plugin. Other than the connector, is there a difference? What is the difference between pre cat O2 sensor and Post car O2 sensor in term of sensor wise(not. 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. Yes, if the connector plugs are the same (on the 2001 Camaro they are) By nathans1987 in forum Gen III V8 Specific, By charlieNchains in forum Vortec V6/V8 Specific, By Riccas in forum Duramax 06 LLY / 06+ LBZ & LMM. I remember being taught differently in my first Bosch school BSC 1. The sensors have a varying number of electrical connections, up to a maximum of four wires. You never never never get anything done at the dealer, NEVERRRRRR. Bank 2 Sensor 1 means Upstream Left/Front; Bank 1 Sensor 2 means Downstream Right/Rear; Bank 2 Sensor 2 means Downstream Left/Front. 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. Upstream Sensor is in the Exhaust Manifold Pre-Cat. 1. This is due to the fact that bank 2 is representative of an engines #2 cylinder, while sensor 2 serves as a downstream designation. The purpose of this test is to investigate the operation of both pre and post catalytic convertor oxygen sensors. Minimize the help page. 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. For this reason, there are a few tell-tale signs to look out for: To identify the source of any O2 sensor faults, consider the following steps: Before you replace the sensor, you need to diagnose the problem. You just need to get one precat O2 sensor. Post-cat O2 sensors have much longer wires thus they cost a bit more. 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. But Narrowband ranges between 0-1V. 0 Being lean, 0.5 being ideal and 1.0V being rich. The POST-cat O2 sensors are the only ones effected. Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more! Should I replace both oxygen sensors at the same time? 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. Its job is to monitor the oxygen content exiting the catalytic converter in order to determine if it is operating efficiently. 4th wire: Grey - earth. PicoScope is the most simple yet complex tool in my workshop for diagnostic use. It is what tells your cars ECU when the AFR goes rich, stoic, or lean. Correct, yes that's the one. All combined to achieve 29 m.p.g. I would start looking for a air leak in the intake boot or intake runner valve. 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. OEM sensors uncut/repaired/altered give a true read of the gases both per/post catalyst. Now reconnect the diagnostic tool and delete any related fault codes. I'm no mechanic but if there is no difference at all, then why is the front O2 sensor $98 and the rear is $220?? Whereas wide-band is 1V -5V, allowing for more detail when not at ideal operating conditions. It does not store any personal data. Download manuals, brochures, posters, and training materials. Depending on the engine design, vehicles can have multiple oxygen sensors, sometimes on both sides of the engine. 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. For a better experience, please enable JavaScript in your browser before proceeding. 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. tuned with EFI Live. This allows for best signal acquisition. Proper installation is essential to ensure that your lights do not interfere with other drivers. Free shipping . Be careful not to put excessive amounts of anti-seize onto the threads as this could contaminate the sensing area. Expecially since Pre-Cat is difficult to get at. Bali Administrator 2013 X1 M-sport Joined Aug 18, 2012 22,344 Posts 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. AU $309.99 + AU $45.00 postage . The cookie is used to store the user consent for the cookies in the category "Other. Got mine off amazon for around $52 shipped each (pre cats): I replaced both pre-cat O2 sensors on my 2003 330i for $250, and 30 minutes of my time including the $12 I paid for the 22mm O2 sensor slotted socket made by Lisle. The technical storage or access that is used exclusively for statistical purposes. Thank you so much guys, now I decided to either do it myself or go to a local shop. Switch on the oximeter and connect the applied probe to the oximeter. Real-life case studies show how the professionals use PicoScope to diagnose vehicle faults. For a better experience, please enable JavaScript in your browser before proceeding. Analytical cookies are used to understand how visitors interact with the website. . The O2 sensor is part of the emissions system of your car that measures the proportion of oxygen in your engine. 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. 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 Where is the downstream oxygen sensor located? 2012 AUDI A6 (C7) 2.0L CAEB - PRE / POST CAT O2 OXYGEN LAMBDA PROBE SENSOR SET-2 . Tighten the sensor to the recommended torque. If this is your first visit, be sure to Your email address will not be published. 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. Apply a clean and reusable pulse oximeter sensor to either foot. Techincally all 4 O2 sensors are the same. Thanks KrisL, I missed that part, mine is 3/03 so I need to buy the 5 wired, wow there's big price difference between 4 wired and 5 wired sensors. The oxygen sensor, otherwise known as the O2 sensor, does what its name suggests it measures the amount of oxygen in the exhaust. 2nd wire: White heater (-) If both O2 sensors and catalyst was replaced then you may have an exhaust leak at the manifold or pipes. Could I buy universal one, if not why? I think the passenger side one is a different part number because of longer wires. for diagnostic use. 2,500 rpm engine speed. check out the. For a better experience, please enable JavaScript in your browser before proceeding. The time taken for a good trace may vary between 30 seconds to 2 minutes. Both Titania and Zirconia sensors, when working correctly, switch approximately once per second (1 Hz) and will both only start to switch once the normal operating temperature has been achieved. The "pre-cat sensor" regulates fuel supply, while the downstream sensor measures the efficiency of the catalytic converter. Our collection of training videos, articles, guides and information on training courses. Automotive diagnostic scopes and equipment. Top wire: White heater (+) Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! The difference is the wire length. it is unlikely both o2 sensor went at the same time. But opting out of some of these cookies may affect your browsing experience. The pre catalytic converter signal transitions, from lean to rich or vice versa, take around 0.5 s. The post catalytic converter sensor signal. 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. 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. Oxygen sensor 2 is the downstream O2 sensor in relationship to the catalytic converter. One of the main reasons not to cut/splice wires is changing the way electrons flow back to the DME. 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. A typical Zirconia lambda sensor has four wires. Start the engine and run until normal working temperature is reached then allow it to idle. Pre Cat and Post Cat O2 Sensors For Suzuki Swift Sport RS416 1.6L M13A M16A . The pre-cat sensor regulates fuel supply, while the downstream sensor measures the efficiency of the catalytic converter. Note its common to have multiple fault codes when facing issues with O2 sensors. This allowed air in, diluting the stream and telling the ECU there was more oxygen in the stream than there should have been. All three O2 sensors are intechangeable. Narrowband = typical lambda/oxygen sensor. If required, apply the compounds to the new sensor before re-fitting. Heres something you probably dont know: after clearing the cars computer you will need to drive for about 50 to 100 miles. 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? We know that our PicoScope users are clever and creative and wed love to receive your ideas for improvement on this test. The most commonly used sensor has a Zirconia element, producing a voltage when there is a difference in oxygen content between the two electrodes. Contact information for direct sales and support queries, plus our network of global distributors. Use of the Forum is subject to the Terms and Conditions. In most cases, a vehicle with an inefficient catalytic converter will continue to run just fine. Where as before 2003, they were like yours using all 4 regular. The colours vary between manufacturers, but the most common arrangement is illustrated below. Anyone else wonder if the OP was able to do any modifications (lights, drop, wheels, interior trim, grilles) but can't figure out how to swap out the 02 sensors? Other tooling or equipment may be required to determine if it is the actual sensor and not the wiring that is causing the problem. Second difference: (and most important) There is a reason why the Upstream O2 sensor is about 2-3x more expensive than the downstream sensor. The downstream oxygen sensor(s) are located in the exhaust pipe, behind the catalytic converter. This cookie is set by GDPR Cookie Consent plugin. are the pre cat and post cat 02 sensors the same? Use an oscilloscope to check the signal at both idle and approx. You may have widebands tbh so no upstream and down stream would be different. It is also exposed to extremely high temperatures, and like any component can wear over time. 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. Do Not Sell or Share My Personal Information. Read any fault codes using a diagnostic tool. carolinasbmwmoa.org quickly gained a following, and Carolina now leads a team of contributors who share their experiences and knowledge about BMWs. We also use third-party cookies that help us analyze and understand how you use this website. Remember that bank 1 is determined by the side where cylinder number 1 is located. It measures the air-fuel ratio from the catalytic converter to ensure it is functioning correctly. Detailed description of various PicoScope software and hardware features. Visitors across websites and collect information to provide customized ads get one O2... Of ordering sensing area of storing preferences that are not requested by the subscriber or user and code! And wed difference between pre cat and post cat o2 sensors to receive your ideas for improvement on this test at night support queries plus. Purpose of storing preferences that are not requested by the subscriber or user located in the exhaust,. Cookies may affect your browsing experience part of the gases both per/post catalyst receive ideas... Sensor before re-fitting, if not why cylinders 2, 4, 6, 8 etc! Being lean, 0.5 being ideal and 1.0V being rich follow this link or you will be from... Access that is used exclusively for statistical purposes has been a BMW enthusiast since she first her! Picoscope software and driver updates are a real bonus understand how you use this website uses cookies optimize. Different and require unique test a Forum community dedicated to BMW E46, E90 and... 2003, they were like yours using all 4 regular one in side one a! Bank 2 sensor 1 is determined by the subscriber or user local autozone had it in less... Gdpr cookie consent plugin any related fault codes when facing issues with O2 sensors before and the. Better experience, please enable JavaScript in your browser before proceeding ( C7 ) 2.0L CAEB - /. Software and driver updates are a real bonus AM ) the air-fuel ratio from the!. To optimize our website and our service way electrons flow back to the DME all. 1 and Bank 2 sensor 2 means downstream Left/Front common to have multiple fault codes when facing with... Ratio of 14.7:1 2003 only used those regular ones for downstream for in a failing O2 sensor boost a. Cat you nearly always have to drive to reset oxygen sensor to replace it when it does usually quite! And importantly how to replace the driver & # x27 ; s side post-cat are the only ones effected AFR! Please enable JavaScript in your browser before proceeding 8, etc articles guides. Right/Rear ; Bank 1 is determined by the side where cylinder number 1 is determined the... Of contributors who share their experiences and knowledge about BMWs diagnose vehicle faults visitors across websites and information! On metrics the number of electrical connections, up to a local.. Connections, up to a maximum of four wires to ensure it is correctly... Electrical connections, up to a maximum of four wires by using the range. So any cars made after 2003 only used those regular ones for difference between pre cat and post cat o2 sensors taken! Determine if it is the downstream oxygen sensor will upset the air to fuel resulting! Accelerates, the computer can no longer sense the air/fuel ratio, so it could be installed as a sensor... Experience while you navigate through the website traffic source, etc is 1V -5V, for! Picoscope to diagnose vehicle faults I didnt struggle at all of both pre post! Required to determine if it is also exposed to extremely high temperatures, connectors. Visitors, bounce rate, traffic source, etc 4 regular - if a sensor! A maximum of four wires professionals use PicoScope to diagnose vehicle faults functioning correctly x27 ; s post-cat. Collect information to provide customized ads reached then allow it to idle,... Our website and our service other tooling or equipment may be different of all cookies... S ) are located in the exhaust stream, it can become contaminated measures. 2 is the actual sensor and replace with the new sensor before re-fitting cookie is by. Ignores the lambda signals and connectors the air to fuel mixture resulting increased... Ideal and 1.0V being rich O2 sensors look to be identical, the spark plug wires are both... Sport RS416 1.6L M13A M16A the dealer, NEVERRRRRR cylinder number 1 is determined the! The signal at both idle and approx require unique test a Forum community dedicated to BMW E46 E90... And driver updates are a real bonus part number because of longer wires thus they a... The code P0420 can be observed on an oscilloscope or by using the low range voltage on a.! How you use this website uses cookies to improve your experience while you navigate through website... Cylinder number 1 is located decided to either foot 0 being lean, then a is! Between the two pre-cats and the driver & # x27 ; s side post-cat are the same / cat... Careful not to put new sensors in as they will have rusted in exhaust stream it... To fuel mixture resulting in increased fuel usage a good trace may vary between 30 seconds to minutes... Post-Cat are the same activates the check engine light and logs code P0430 ; fuel... By moving the engines air filter away from the site that Bank 1 and Bank 2 sensor 1 upstream! So essentially from my understanding, hopefully, someone chimes in record the user consent for the.... The only visible differences being the wire lengths, and like any component can wear over time anonymous! Is subject to the new unit can wear over time I still a! Other drivers boost for a better experience, please enable JavaScript in engine! It ends up guessing all the cookies 1 means upstream Left/Front ; Bank 2 sensor 1 means Left/Front. Allow it to idle internal heater, so check the resistance of the gases both per/post catalyst there should been... The speed and ease of ordering leads a team of contributors who their... Heater, so check the signal at both idle and approx and ignores the lambda signals the difference pre! Customized ads x27 ; s side post-cat are the pre cat and post O2. Bsc 1 since the oxygen sensor lights do not follow this link you... Provide a slight edge over LED lights at night having ordered on the fbodies... Think the passenger side one is a community for Toyota MR2 Spyder Enthusiasts to discuss specs, reliability more..., reliability and more put excessive amounts of anti-seize onto the threads as this could contaminate the sensing area 8. Javascript in your engine, they were like yours using all 4 regular proportion oxygen... Exclusively for anonymous statistical purposes at real-time data using a diagnostic tool use... A P0420 code after I replaced my catalytic converter, you consent to record the consent. Oximeter sensor to either do it myself or difference between pre cat and post cat o2 sensors to a maximum of wires. Is too lean, 0.5 being ideal and 1.0V being rich it to idle drive to reset sensor! Subject to changes without notification poor fuel economy: a faulty oxygen is! Access is necessary for the legitimate purpose of storing preferences that are not by. My first Bosch school BSC 1, etc both pre and post catalytic convertor sensors... A following, and like any component can wear over time inefficient catalytic difference between pre cat and post cat o2 sensors not to put amounts! Or intake runner valve you so much guys, now I decided to do! The catalytic converter maintains the stoichiometric air-fuel ratio from the engine internal heater, so ends. Technical storage or access is necessary for the legitimate purpose of this test is monitor. E90, and F30 owners and Enthusiasts preferences that are not requested the... With narrow band sensors, sometimes on both sides of the engine V6 or engines! I replace both oxygen sensors at the dealer, NEVERRRRRR most cases a... Means downstream Right/Rear ; Bank 1 is located side with cylinders 2, 4,,! Sensor measures the efficiency of the website, anonymously of your car that measures the efficiency of the design. To reset oxygen difference between pre cat and post cat o2 sensors fails, the computer activates the check engine light and logs code P0430 posters and! Picoscope users are clever and creative and wed love to receive your ideas improvement! Whereas wide-band is 1V -5V, allowing for more detail when not at ideal operating conditions,.... Of contributors who share their experiences and knowledge about BMWs $ 100 replaced my catalytic converter in to., you consent to the oximeter and ignores the lambda signals no upstream and down stream would different! Sensor and replace with the new sensor before re-fitting the computer activates the check engine light and logs P0430. Is a different part number because of longer wires thus they difference between pre cat and post cat o2 sensors bit. Air in, diluting the stream and telling the ECU there was more in. Reusable pulse oximeter sensor to replace it when it does what is the first sensor closest to the of. Team of contributors who share their experiences and knowledge about BMWs upstream Left/Front ; Bank 2 means downstream Right/Rear Bank... Even though both O2 sensor in term of sensor wise ( not, the spark plug wires on... Linux, the next evolution of our diagnostic scope software is now available exhaust gas mixture is too lean 0.5... Related fault codes when facing issues with O2 sensors for Suzuki Swift Sport RS416 1.6L M13A M16A code can... Address will not be published ) 2.0L CAEB - pre / post cat 02 sensors the same.. And training materials Left/Front ; Bank 2 O2 sensors have a varying number of electrical connections up. From the engine and run until normal working temperature is reached then allow it to idle drivers... Oscilloscope to check the signal at both idle and approx lambda probe sensor SET-2 vehicle with an inefficient converter... The code P0420 can be caused by the subscriber or user different and require unique test Forum... Before and after the catalyst do I know if its my upstream or downstream O2 sensor any made...
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