O2 oxygen sensor bank 1 - Which part # for O2 sensor Bank 1 sensor 1? Jump to Latest Follow 9K views 6 replies 3 participants last post by pbethel Apr 14, 2023

 
Sensor#2 is the downstream post-cat o2 sensor. Locate the bank#1 catalytic converter. Sensor #2 will be after/behind the cat. Reactions: GrizChev. Save Share. Like. caveyman1955. ... Redace - 3.9 only has two oxygen sensors, one upstream (bank 1 sensor 1) and one downstream (bank 1 sensor 2).. Dicks sports

Jul 7, 2017 ... The other three O2 sensors fluctuate in both voltage and rich/lean as shown the recording playback on my Bosch OBD 1350 scan tool. Does this ...Dec 8, 2017 · About this item . Warranty: 1-YEAR / 365-DAYS UNLIMITED MILEAGE WARRANTY. ALL THEBIGDEALS oxygen sensors are extensively tested during manufacturing to guarantee quality,reliability,and above all,always meet or exceed the original equipment specifications.Replace faulty sensors with confidence in THEBIGDEALS Oxygen Sensor. I forgot to add that Bank #1 is the passenger side and that Sensor #1 is the sensor closest to the engine.Using the front jack point of the vehicle, jack up the car. Put jack stands under the frame towards the front of the vehicle. Gently lower the vehicle back down on the stands. 3. Disconnect O2 Sensor. Find the O2 sensor that needs to be removed. It should be part of the exhaust system, and it resembles a plug.Aug 21, 2007 · I scanned it and it read o2 Sensor Malfunction (Bank 1, Sensor 2). The guys at the AutoZone told me that this sensor is on the passenger side of the truck and is located on the exhaust pipes. I checked under the truck and found 1 on the driver side 1 on the passenger side and one by the Cat System. So i am guessing I have 3 02 sensor on my 1999 ... Table of Contents What are Bank 1 and Bank 2? How to locate an Oxygen Sensor Bank 1 Sensor 1 Location Bank 1, Sensor 2 Location Bank 2, Sensor 1 Location Bank 2,, …Buy Now!New O2 Oxygen Sensor from 1AAuto.com http://1aau.to/ia/1AEOS00228This video shows you how to install a bank 1 downstream O2 sensor on your 2011-2019 ...Posted September 4, 2006. After a recent visit to the dealers regarding a management light, they told me that their system was showing the following code: P0135 Oxygen Sensor Heater Circuit (Bank 1 Sensor 1). Ive read a few topics on O2 sensors after this and decided to replace it myself due to the £200 charges labour, parts etc.Jan 12, 2021 ... I changed both oxygen sensors on my 2004 Odyssey. It is imperative that the first, forward sensor be the Honda OEM part by Nippon Denso.durango-bob. 3260 posts · Joined 2008. #6 · Nov 27, 2016. I just replaced both the upstream sensors on my '06 3.7L - what a nightmare. I started on the drivers side and although I could see the connector, reaching it was going to be a chore. So I decided to remove the sensor first.Table of Contents What are Bank 1 and Bank 2? How to locate an Oxygen Sensor Bank 1 Sensor 1 Location Bank 1, Sensor 2 Location Bank 2, Sensor 1 Location Bank 2,, …Your oxygen sensors produce a voltage based on the oxygen content of the exhaust. The ECM unit monitors this voltage in real time, using its feedback to adjust the engine’s fuel needs. This allows for a more precise fuel injection process, leading to a more efficient engine performance.Similarly, sensor 2 located after the catalytic converter’s rear end is the downstream O2 sensor. In a Ford F-150 or in Fords in general, cylinder #1 is located on the passenger side and the passenger side is designated as “Bank 1”. As a result, the engine’s driver’s side is designated by “Bank 2”.just video of sensors location on 2.4L Error p0031 for bank 1 sensor 1Error p0138 for bank 1 sensor According to the manual, torque for Oxygen sensor (Lambda...The bank 1 sensor 1 O2 sensor pumping circuit was lower than the minimum acceptable value and needs replacing. Just got a quote from the dealership for $515 to replace to replace the O2 sensor bank 1 sensor 1. The part from the dealership cost $269.59. Like.just video of sensors location on 2.4L Error p0031 for bank 1 sensor 1Error p0138 for bank 1 sensor According to the manual, torque for Oxygen sensor (Lambda...2880 posts · Joined 2018. #2 · Mar 21, 2022. Bank 1 is where cylinder #1 is located, so on the 3.3 rear of engine closest to the firewall. Sensor 1 is the upstream O2 sensor before the cat and sensor 2 would be the downstream O2 sensor after the cat. Hopefully a bad sensor, but one never knows unless a scan is done, good luck.The O2 sensor produces a voltage based on oxygen content in the exhaust. The voltage varies between .1 and .9 Volts, ... P0443, P0130, P0300, P0301, P0302, P0303, P0304, P0314 P0141 - O2 sensor bank 1 sensor 2 P0400 - exhaust gas …A faulty oxygen sensor can cause several problems in a car including a poor fuel economy, failure of the catalytic converter and an overall bad engine performance. Cars that were m...May 20, 2018 · oxygen sensor bank 2 sensor 1. I am not sure I am posting this in the correct subforum. (Asking for my DH-three vehicles to have inspected by the end of May and 2 have oxygen sensor issues=frustration) We purchased our third Astro Chevy van 2003 AWD for $300 with known issues. The last inspection was 11/2015. We have diligently replaced all or ... Oct 5, 2022 · This will be the only upstream sensor on in-line engines. On V-shaped engines, it is necessary to determine which is bank 1. What does Bank 1 Sensor 1 Mean? These oxygen or O2 sensors are located between the bank 1 cylinder head and the corresponding catalytic converter. The task of this sensor is to measure the composition of raw exhaust fumes. Posted September 4, 2006. After a recent visit to the dealers regarding a management light, they told me that their system was showing the following code: P0135 Oxygen Sensor Heater Circuit (Bank 1 Sensor 1). Ive read a few topics on O2 sensors after this and decided to replace it myself due to the £200 charges labour, parts etc.Buy YOUCANIC Pro Scanner https://www.youcanic.com/scanner/Get Factory Service Repair Manuals & Specs https://www.youcanic.com/manualsAsk Car Questions & Get ...3.5 liter V6, bank 1, sensor 1 (upstream)5. Use a stubby combination wrench or cut a normal one in half and put the box end on the sensor. At this point all i did was push into it a little and it turned right out without a problem. 6. put new oxygen sensor in and plug into harness. 7. Unscrew wheel well liner and push back into place or reinstall wheel well liner. 8.Primary O2 Sensor (Bank 1, Sensor 1) — This sensor is located in the exhaust manifold or the exhaust pipe just before the catalytic converter. It provides real …Dec 12, 2012 ... I need a new sensor because apparently the o2 sensor wires are stainless steel, not copper. So when I made an ...FORD FOCUS WHICH OXYGEN SENSOR IS UPSTREAM DOWNSTREAM BANK 1 SENSOR 1, SENSOR 2 2012 2013 2014 2015 2016 2017 2018Oxygen Sensor used in the video: Upstream ...Apr 12, 2022 · Then I dropped new sensor down between the engine and the unibody rails , keeping clear of the header pipe. Before installing it in the exhaust, I wound the sensor and wires up counterclockwise as far as I could, then stuck the sensor into the exhaust and tightened. Been working for 3 years. Now you can go on Amazon and buy extensions already ... Bank 1 is on the side where cylinder 1 is located; that’s for any car. On the Mercedes – Benz V6 and V8 engines Bank 1 refers to the right side of the vehicle, the passenger side, for left-hand drive vehicles. Bank 1 Sensor 1 is the upstream (pre-cat) on the passenger side. Bank 1 Sensor 2 is the passenger side’s downstream (post cat).Jun 16, 2018 · bank 1 sensor 1 O2 sensor location. Hey everyone I've been getting a code of P0131. My new code reader says its 02 circuit low voltage (bank 1, sensor 1). My research says bank 1 is on the passenger side of the truck and sensor 1 is pre cat. I've also read it should be near the exhaust manifold and it looked like inside the engine bay. A faulty oxygen sensor can cause several problems in a car including a poor fuel economy, failure of the catalytic converter and an overall bad engine performance. Cars that were m...Ok, so I have a 2004 Tundra, Double cab, SR5 V8. When I bought it (back in Nov 13) the check engine light was on. Finally got it check out at auto zone and it was Bank 1, Sensor 2 Oxygen sensor. I slightly mechanically inclined and this seems like a very easy fix, I just am not sure where this sensor is located.Below is a link that will show the BMW brand part, & the part made for BMW, by the vendor that made them. Banks 1, sensor 2 would be the 2nd O2 sensor on the passenger side of the engine. Sensor 1 is the sensor before the 1st Cat, sensor 2 would be after the 1st cat. Since it is the heater circuit, make sure the fuse has not blown.Sep 14, 2023 · DTC P0141 stands for “Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2), and this indicates that there’s something wrong with the heater circuit of engine bank 1’s downstream O2 sensor. P0141 is typically caused by a faulty oxygen sensor heater, but it is also caused by problems with a vehicle’s circuitry or its PCM. How to find a replace the oxygen sensorThe P0420 code means “Three-Way Catalyst Malfunction” in new Nissan models instead of “Catalyst System Efficiency Below Threshold (Bank 1).”. Either way, the code indicates a decline in the catalytic converter’s performance. One way to determine whether faulty O2 sensors triggered this trouble code is to force the air/fuel mixture to ...5. Use a stubby combination wrench or cut a normal one in half and put the box end on the sensor. At this point all i did was push into it a little and it turned right out without a problem. 6. put new oxygen sensor in and plug into harness. 7. Unscrew wheel well liner and push back into place or reinstall wheel well liner. 8.Feb 5, 2019 · 1840 posts · Joined 2017. #2 · Feb 4, 2019. Dont need a part number there is no oxygen sensor that your referring to. It's a fuel air ratio sensor, likely why you cannot find the part. Buy only Denso part, look it up as 2008 CRV Fuel Air Ratio sensor IIRC and can find it easily. Sent from my SM-G950U using Tapatalk. Aug 21, 2007 ... So i am guessing I have 3 02 sensor on my 1999 V10. I bought the replacement sensor and installed it myself. I cleared the codes after ...234-5113 Front Oxygen Sensor Replacement for Ford 2009-2015 F-150, 2013 2014 2015 Explorer, 2009-2014 E-350 Super Duty Bank 1 Sensor Air Fuel Oxygen Sensor. 25. $3999. Save 6% with coupon. FREE delivery Thu, Feb 8.Mar 29, 2016 ... I found the sensor on Amazon for $93.00 plus tax. I think I can replace the other O2 sensors, but this one is pretty hidden. If the labor is ...This generic OBD2 code is set when the Powertrain Control Module (PCM) senses that the upstream oxygen sensor positive circuit is open. This particular code is pointing out the bank 1, in other words, the bank of cylinders containing cylinder #1. The sensor 1 tag is indicating the upstream O2 sensor located just before the catalytic …Feb 21, 2023 · Bank 1 Sensor 2 is the second of two oxygen sensors on the exhaust pipe. It monitors the composition of exhaust gases located behind the catalytic converter. There will be harm to the engine’s operation and the car’s general performance if this sensor fails. Buy YOUCANIC Pro Scanner https://www.youcanic.com/scanner/Get Factory Service Repair Manuals & Specs https://www.youcanic.com/manualsAsk Car Questions & Get ...Repco have the best range of oxygen sensors at the best prices. Optimal engine performance comes from the precise air fuel ratio being ignited at the exact time to maximise combustion. The oxygen sensors in your vehicle measure this ratio and work with the engine computer to meter the fuel mixture entering the combustion chamber.Aug 21, 2007 · I scanned it and it read o2 Sensor Malfunction (Bank 1, Sensor 2). The guys at the AutoZone told me that this sensor is on the passenger side of the truck and is located on the exhaust pipes. I checked under the truck and found 1 on the driver side 1 on the passenger side and one by the Cat System. So i am guessing I have 3 02 sensor on my 1999 ... Aug 21, 2007 ... So i am guessing I have 3 02 sensor on my 1999 V10. I bought the replacement sensor and installed it myself. I cleared the codes after ...Jan 29, 2010 ... Bank 1 is on the passenger side where the #1 cylinder is. Bank 2 is on the driver side. Sensors 1 are the upper oxygen ...5 posts · Joined 2014. #1 · Aug 5, 2014. My check engine light went on and it's reading code P0133, which means I most likely need to replace the bank 1 sensor 1 o2 sensor. I went ahead and bought the part for about $20 but now I'm not 100% I know which sensor that is. This picture is looking up from underneath the jeep, the sensor on the ...Diagnostic trouble code (DTC) P0130 stands for “O2 Sensor Circuit Malfunction (Bank 1, Sensor 1).” It indicates that the PCM has detected a potential …What’s going on HEMI Gang 💪🏾💉 !! Can Ya Hemi back again with another video for you guys. This video shows how to change an oxygen sensor on a dodge char...WHERE IS O2 SENSOR BANK 1 SENSOR 2 ON A CAR, OXYGEN SENSORIf you have a car and you need to replace oxygen sensor bank 1 sensor 2 / downstream oxygen sensor ...The bank 1 sensor 1 O2 sensor pumping circuit was lower than the minimum acceptable value and needs replacing. Just got a quote from the dealership for $515 to replace to replace the O2 sensor bank 1 sensor 1. The part from the dealership cost $269.59. Like.The pre-cat sensors are accessible from up top, and look easier to do, while the post-cat ones are underneath. I think the B=1 S=2 sensor is the one positioned vertically (rear, closer to passenger side). I want to learn all these repairs as they come at me, but I wanted to run some things by you DIY pros out there.Jan 12, 2021 · Jaggy_233 said: I got a check engine light last week. Took it into autozone and found. "Code P0247 indicates that the Bank 1, Sensor 2 O2 electrical circuit signal had low voltage for a predetermined period of time. P0137 HO2S Circuit Voltage Low. P0137 HO2S Circuit Voltage Low". Mar 29, 2016 ... I found the sensor on Amazon for $93.00 plus tax. I think I can replace the other O2 sensors, but this one is pretty hidden. If the labor is ...READ DESCRIPTIONBANK 2 SENSOR 1 DIY VIDEO ~ https://www.youtube.com/watch?v=zmUXM-dbRf8Parts:2005-2006 A/F sensor: https://amzn.to/2KH11Zw2007-2010 A/F senso...The P2237 is defined as “O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1.” This code is triggered when the powertrain control module (PCM) detects inconsistent signals from the oxygen sensor in engine bank one. Problems like a faulty oxygen sensor, exhaust leaks, wiring issues, or PCM failure can trigger the P2237 code.What’s going on HEMI Gang 💪🏾💉 !! Can Ya Hemi back again with another video for you guys. This video shows how to change an oxygen sensor on a dodge char...Full Video: https://youtu.be/ltMNSmSWYX4 Buy Sensor: https://ebay.us/DLd1xN or https://amz.run/6gZFThe bank 1 sensor 2 oxygen sensor is an important componen...Both to improve engine efficiency and minimize emissions, vehicles manufactured after 1980 have at least one O2 sensor. With few exceptions, automotive internal-combustion engines require a oxygen-to-gasoline ratio of 14.7:1. If there is not enough oxygen in the mixture, excess fuel sticks around after combustion. Mechanics call this a rich ... These oxygen or O2 sensors are located between the bank 1 cylinder head and the corresponding catalytic converter. The task of this sensor is to measure the …Mar 18, 2023 ... Cylinder 2 is overperforming, (+) value. This may mean that cyl 2 is running richer than 1 & 3. The DME is removing fuel to compensate for cyl 2 ...The O2 sensor must have a source of oxygen from outside of the exhaust stream for comparison. Current O2 sensors receive their fresh oxygen (outside air) supply through the O2 sensor case housing. Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines. The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle …Oxygen cylinders or O2 cylinders have divided into two categories, bank 1 and bank 2. Bank 1 and Bank 2 represent the engine sides. Bank 1 represents the side of the engine in which the 1st cylinder is installed. This article describes the difference between Bank 1 and Bank 2, and how to locate the O2 sensor. Find Bank 1 or Bank 2 on Your Car. You’ll need to determine bank 1 vs. bank 2 to find the upstream and downstream O2 sensors. You can tell which bank is which by looking at the firing order of your vehicle’s engine. The bank that includes cylinder 1 is bank 1, and the other bank will be bank 2, regardless if if it includes cylinder 2 or not.The oxygen (O2) sensors measure the O2 content in the exhaust system. Typically installed in the exhaust manifold or downstream in the exhaust pipe, the O2 sensors are positioned directly in the path of the exhaust gas stream. The O2 sensors also play an important role in helping the powertrain control module (PCM) to maintain …I forgot to add that Bank #1 is the passenger side and that Sensor #1 is the sensor closest to the engine.May be similar for other models. Bank 1 is closest to the firewall on the 3.6 engine.Jan 4, 2024 · A properly functioning oxygen sensor will show a rapidly fluctuating output voltage between approximately 0.1 and 1.0 volts . When the air-fuel mixture is perfect, the O2 voltage value will be exactly 0.45V. As the mixture becomes rich, the voltage will increase (up to 0.9 volts). If the fuel mixture is burning lean, there will be more oxygen ... Sensor 1 is the one that is closest to the engine, making it the upstream oxygen sensor. There’s another oxygen sensor in the engine. This is sensor 2 located downstream, making it the downstream oxygen sensor. On most in-line engines, the bank 1 sensor 1 is located the front side of the engine, near the cylinder head. Then I dropped new sensor down between the engine and the unibody rails , keeping clear of the header pipe. Before installing it in the exhaust, I wound the sensor and wires up counterclockwise as far as I could, then stuck the sensor into the exhaust and tightened. Been working for 3 years. Now you can go on Amazon and buy extensions …Toyota Engine Bank 1 and Bank 2 A/F and O2 Identification. This page provides information on the proper identification of engine bank 1 and engine bank 2 for correct A/F sensor …Oct 5, 2021 · The O2 sensor is mounted in the exhaust stream where it reads the oxygen content of exhaust gases. Many vehicles have a sensor upstream, nearer the exhaust manifold, and another one down toward the catalytic converter. In this instance, Bank 1 Sensor 1 would mean the sensor closest to the manifold, on the driver's side cylinder bank of a V6 or ... All Dodge Caravans are equipped with at least one oxygen sensor, or O2 sensor for short. The sensor measures the mix of air and fuel going into the engine. It ensures that the van ...Repco have the best range of oxygen sensors at the best prices. Optimal engine performance comes from the precise air fuel ratio being ignited at the exact time to maximise combustion. The oxygen sensors in your vehicle measure this ratio and work with the engine computer to meter the fuel mixture entering the combustion chamber.Mar 21, 2022 ... Bank 1 is where cylinder #1 is located, so on the 3.3 rear of engine closest to the firewall. Sensor 1 is the upstream O2 sensor before the cat ...Table of Contents What are Bank 1 and Bank 2? How to locate an Oxygen Sensor Bank 1 Sensor 1 Location Bank 1, Sensor 2 Location Bank 2, Sensor 1 Location Bank 2,, …Jan 4, 2024 · A properly functioning oxygen sensor will show a rapidly fluctuating output voltage between approximately 0.1 and 1.0 volts . When the air-fuel mixture is perfect, the O2 voltage value will be exactly 0.45V. As the mixture becomes rich, the voltage will increase (up to 0.9 volts). If the fuel mixture is burning lean, there will be more oxygen ...

The bank 1 sensor 1 O2 sensor pumping circuit was lower than the minimum acceptable value and needs replacing. Just got a quote from the dealership for $515 to replace to replace the O2 sensor bank 1 sensor 1. The part from the dealership cost $269.59. Like.. Pa 511 cameras

o2 oxygen sensor bank 1

The sensor is mounted in the exhaust manifold to monitor the amount of oxygen in the exhaust. Faulty oxygen sensors cannot send the correct air-fuel ratio data to the engine control module, leading to inaccurate guesses about the amount of fuel your engine needs. This is why when the sensor fails, vehicles can start consuming far more fuel than ... What Is a P0130 Code? A P0130 code represents a problem with the O2 sensor circuit in bank 1 of the engine, and it's the first sensor in this circuit. The sensor …Nov 23, 2021 · Which part # for O2 sensor Bank 1 sensor 1? Jump to Latest Follow 9K views 6 replies 3 participants last post by pbethel Apr 14, 2023 1 - 24 of 5746 results for Oxygen Sensor Compare Refine. All Pick Up in Store Ship to Home Sort By: Compare. Walker Direct Fit Oxygen Sensor - 350-31002. Part #: 350-31002 Line: WLK. 1 Year Limited Warranty. Number Of Wires: 1. Thread Size: ...bank 2 sensor 1..... Driver side near exhaust manifold bank 1 sensor 2..... near cat converter, if you have dual exhaust and 2 cats, then it would be passenger side O2 near cat Sensor 1's help computer control fuel trim lean/rich feedback Sensor 2's test if cat is working and clean up exhaust emissions, they are also used in Long Term Fuel trimsThe oxygen (O2) sensors measure the O2 content in the exhaust system. Typically installed in the exhaust manifold or downstream in the exhaust pipe, the O2 sensors are positioned directly in the path of …Toyota Engine Bank 1 and Bank 2 A/F and O2 Identification. This page provides information on the proper identification of engine bank 1 and engine bank 2 for correct A/F sensor and oxygen sensor replacement. Contains information that identifies engine bank 1 and engine bank 2 on the following engines: 1AZ-FE, 2AZ-FE, 2AZ-FE (PZEV), 1GR-FE, …Here's how to fix an oxygen sensor on the Chevy Captiva. I show you how to replace an O2 Sensor on the Chevy Captiva, but this may be helpful for other cars ...Jun 22, 2009 ... confirmed that the O2 sensor has a fault and said it is BANK 1. I asked which one that is and he didn't know. The TB has two O2 sensors, one ...Jan 12, 2024 · A P0130 code represents a problem with the O2 sensor circuit in bank 1 of the engine, and it's the first sensor in this circuit. The sensor is typically located right before the catalytic converter and provides an oxygen reading for the ECU. Sensor 1 in the circuit is responsible for reading and reporting the amount of oxygen in exhaust fumes ... Bank 1 means the bank containing #1 cylinder. From everything I can see, on any transverse mounted V-6 TOYOTA engine, the bank closer to the firewall contains cyl #1. Sensor 2 will be the second sensor in that bank, with the count starting at the engine head. It should also be the last (closest to tailpipe) sensor in that bank.A week ago, two more codes came up, P0138 Powertrain - O2 Sensor High Voltage (Bank 1 Sensor 2) and P0037 Powertrain - O2 Sensor Heater Control Circuit Low (Bank 1 Sensor 2). This was good as now I knew where the issue was and that most likely I only had to replace that sensor.If you believe your O2 sensors may be causing your Check Engine light, visit your local O'Reilly Auto Parts for free Check Engine light testing. Though the Check Engine light will likely activate in any case, there are other symptoms that may accompany this warning if your oxygen sensors are failing. These include: Rough or erratic idle. May 23, 2010 · For like $240 you can get the actual OEM O2 sensor from online Acura places. The CRSX one will probably work fine but for a few more bucks I'd go with the real thing. If the CRSX one was like 1/2 Id think about it...but $240 for another 100,000 miles of useage aint bad. 2002 RSX-S (196,000 miles ) WD-40 stands for Water Displacement. Feb 9, 2010 · 06MonteSS. 414 posts · Joined 2010. #5 · Feb 9, 2010. O2 bank 1 sensor 1 is the driver's side, front O2 sensor, the one before the CAT... 06MonteSS / DiabLew Tune. www.diablewtune.com. 2014 Camaro 2SS-RS LS3, short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake, custom DiabLew Tune. Jun 22, 2009 ... confirmed that the O2 sensor has a fault and said it is BANK 1. I asked which one that is and he didn't know. The TB has two O2 sensors, one ...Jan 31, 2021 ... I have gotten the trouble code P0137 twice in the past week. This code shows it is the oxygen sensor for Bank 1, Sensor 2.P0161 – Sensor Heater Circuit Bank 2 Sensor 2. P0135 – O2 Sensor Heater Circuit Bank 1 Sensor 1. P0155 – O2 Heater Circuit Bank 2, Sensor 1. To better grasp why this code, you should understand how heated oxygen sensors work. Used for post catalyst monitoring and fuel control, heated oxygen sensors compare the …Mar 1, 2019 ... Bank1 Sensor2 is the O2 sensor that is found screwed into the bottom side of the pre-catalytic converter (aka, downstream). It is the one ....

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