(50) BBK Catted H-Pipe (96-04 4. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. IMO it would be naive to believe (without doing any other trouble shooting) that removing the Bosch O2's and replacing with Motorcraft units would fix the problem. Here's the wiring diagram for the O2 sensors. . Exhaust Accessories, such as the MIL-eliminators, Ceramic Catalytic Converters, and the O2 Sensor, will give your Pony that show-winning quality, or just to make it look and sound that much better on the track or. Replacing the O2 Sensor Bank 1, Sensor 1. For example IF an "application" uses a wide band O2 sensor in the front O2 sensor and a narrow band O2 in after cats THEN swapping the O2 sensors would most certainly cause a problem. I am still receiving CEL codes p0300, p0316, and p0302. 920v), the lower the more fuel (0. On the BBK CAI system there is a hole in the tube for a temperature sensor, well wouldn't you know the 2002 model does not have a temp sensor in the intake tube, it is built into the Mass Air Sensor. I have a 1997 Cobra with an off road H pipe and am having the following issues. 99. I'm going to replace the O2 sensors myself, from what I've read they're a very easy job to do yourself with this year/model. bank 2 = passenger side. O2 oxygen 8lOxygen mustang ford ebay Hatchback fits svt o2 oxygen convertible sensor mustang gt pair ford4pcs o2 oxygen sensors ford mustang 1999-2003 direct fit 3. Low Stock. Ford Racing 5. 6 to 19%. In some cases the threads will need to be repaired. If you're looking to replace both sensors then you'll need a meter that's able to take input from and send an analog signal out for both sensors. LCA's, AntiSquats. intake manifold and the driver's side firewall. The rear sensor tells if there's to much gas in the tailpipe that's not burned. Part Number: DNP-234-4610. Now I just need to get my A/F gauge hooked up. T Shocks & Struts, J&M Caster Camber Plates, Steeda Bumpsteer Kit, UPR Elite LCA's & UCA's. Tks for the input! Fuel level is only for the evap. All of the O2 sensor plugs should have a red/yellow wire and a grey/red wire. Generally, if we are talking about O2 sensors: Sensor 1 = Before Catalytic converter Front (Upstream O2 sensor) Sensor 2 = After Catalytic Converter Rear (Downstream O2 sensor) Some diesel engines have many. Check Details. Bosch Exact Fit Oxygen Sensor 15717. Michigan Motorsports takes out the guesswork with this 2018-2020 Mustang GT O2 extension kit! The factory harness cannot reach the new O2 sensor location, therefore these plug and play extension harnesses are needed. 2006 f150. 2017 Mustang GT Premium - Grabber Blue, Manual, Performance Pack, 401A, Premier Trim - Sold 2021 Mustang Mach 1 Premium Chassis #5059 - Fighter Jet Gray, TREMEC, 700A, Elite Package, Appearance Package, Handling Package, Navigation, Kook's Green Catted Headers, GT500 Borla ATAK Catback, Wengerd Performance. Both Sensor 1's are the front sensors (toward the engine) the bank specifies which side of the car (I think Bank 1 is driver's side and 2 is passenger's side) cfkboyz Discussion starter. 920v), the lower the more fuel (0. PRICE: 56. SN95 4. I have to put in more fuel and get it above 3/4 tank and try it again hopefully the next round of driving will make the 02's ready. so most likely it's going to be one of the front 2 sensors that need replacing . 0L Mustang is the oxygen sensor. FREE 2 or 3-Day Delivery on Orders $119+ Details. And with 7,000-plus rpm capabilities and 390 lb. About this item . Front and rear O2 sensors give feedback to the ECM as to the Airfuel mix. Here's the wiring diagram for the O2 sensors. 28. Not Yet Reviewed. A worn-out oxygen sensor can cause engine performance problems and shorten the life of. Hand-picked by experts! Pay later or over time with Affirm. FORD MUSTANG, MUSTANG GT, SVT COBRA, MACH 1. Application. It started with code 0301 (misfire on cylinder 1) so I replaced the coil and plug, problem solved. Sep 9, 2005. A MONTH later the code comes back (The code again popped up within a few miles of driving) so I decide to change the 02 sensors, replace the air filter, clean the. went to autozone and got these codes pulled from my comp. However I was also told that my 94 auto v6 has 4 o2 sensor locations. 1994-1998. escottcarp said: I’m having some troubles with both O2 sensors (P0141, P0161 and P0156). B1 S2 and PO156 O2 sens. So i have a 2011 mustang gt with 66,000 miles on it. 1996 - 2004 Mustang GT (SN95 - 4th Gen - 4. The purpose of oxygen sensors is to sniff the amount of oxygen in the exhaust gas as it flows out of the headers and report back to your Mustang’s engine control unit (ECU) as to what the fuel mixture is. O2 sensor wiring. Because the new vehicles use a different monitoring style. 4561 Views 13 Replies 4 Participants Last post by cliffyk, Jan 14, 2015. After driving almost 1,100 miles and replacing rear o2’s in desperation, it still wouldn’t clear. What Is An Oxygen Sensor. Bosch Oxygen Sensor - 17025. An OBD-II diagnostic scan could return code P0135 due to any of the following causes: High resistance in O2 heater element or O2 heater circuit wiring. . Tight tolerance ranges help minimize repeat repairs and false "Check Engine". All you have to do is push down the little tab and pull them apart. Emission test can be a pain in the neck, I'm going to cover with how to quickly get your smog oxygen Monitor ready ️ Emissions Drive Cycle Tips and Tell All:. #1. Your Mustang's O2 sensors read the amount of oxygen in your exhaust to. It has a *consumable* source that actually converts the. 45 volts is interpreted by the ECM as a rich exhaust, and an O2 sensor voltage signal below 0. Downstream O2 sensor voltages are supposed to be steady with little fluctuation. The cel would usually come on after 50 miles. 5. Fix yours today with a replacement sensor or extension harness to fit your application. The rear are there just for emissions. 6L Mustang Forums (1996-2004) 4. Add to quote; Share Only show this user. Recommended Communities. 2002. Well a few days ago I decided to. I'm going to replace the O2 sensors myself, from what I've read they're a very easy job to do yourself with this year/model. The hole needs to be plugged on the 2002 models maybe even some other years between 99-04. 2004 Mustang Parts; 2003 Mustang Parts; 2002 Mustang Parts; 2001 Mustang Parts; 2000 Mustang Parts. I have done a scan on it and everything looks OK. Motorcraft Oxygen Sensor. So if you have a manual trans and can’t ready the monitors, try 40 mph in sixth gear low rpm. Shop 1994-1998 Ford Mustang O2 Sensors. Motorcraft Mustang Oxygen Sensor (O2 Sensor) GT 4. K. #howto #cars #ford #diy #easy #shorts How To Remove And Install Mustang Front Oxygen Sensor Bank 2 Sensor 1o2 sensor,oxygen sensor,o2 sensor removal,bad oxyg. Joined. The single wire O2 is a E6ZE or ZF part number. Late Model Restoration has you covered with this Motorcraft O2 sensor. Whats up guys, I've got a 1996 Mustang GT with about 95,000 miles on it and the check engine light has been on for a few months now and i've finally had time to go and get it checked out and the codes are PO136 O2 sens. 2000 Mustang GT Steeda #0048 34k miles. 3Turbo #1978. 1996 - 2004 SN95 Mustang -General/Talk-. However, then they will be off when/if you need an emissions test and will fail that test unless you get an emissions tune for testing. #5. I figure either header leak at the heads, o2 sensors, or maybe something else. 4. The front O2 sensors should never be disabled. As a result, you actually lose a lot. Those are hte only pair of 02s that can be turned off by a tune/mil eliminators. The one in front of the converter does the heavy lifting of providing output to PCM to regulate the air to fuel ratio via trims to the injectors. Engine missing is usually caused when a bad oxygen sensor affects the air/fuel mixture and engine combustion. Do you need to Replace the oxygen sensor on your Ford Mustang (1994 - 2004) but don't know where to start? This video. 02 GT throwing several codes, #8 fuse. (Only the widebands are different. It is more evident when the automobile is at idle and/or running at a very low. From there the customer did a 4 miles long drive going a steady 40mph, afterwards the o2 sensor, o2 heater, and catalysts came up ready. The car used to have cat less H pipe on the stock headers. Then when going to reinstall them I realized I didn't mark the left and right sides. 0. Disconnect the electrical connection to the oxygen sensor. We currently carry 13 Oxygen Sensor products to choose from for your 2014 Ford Mustang, and our inventory prices range from as little as $52. Other Names: Ft Oxygen Sensor, Upper Oxygen Sensor, Sensor Hego, dy1178. 1979-1993. Get deals on automotive parts, truck parts and more. Jun 9, 2014. In Stock. ) The secondary power ground is between the back of the. #2. When you start the engine, the engine control module tests the O2 sensor heater circuit. Remember: the O2 sensors are detecting oxygen, not fuel, so even if a spark plug is misfiring and there is fuel in the exhaust along with unburned O2, the O2 will drive the sensor to signal a lean mix. Mustang Forums. The rear O2 sensors are located after the catalytic converters on the mid-pipe. Hello everyone, as the title states I am having issues with a P2197 O2 sensor code that indicated my O2 sensor in Bank 2 sensor 1 is stuck lean. 2016 Mustang GT PP - Red May 19, 2018 #15 dsp4848 said:Mostplus 234-4587 O2 Oxygen Sensor You get 2oxygen sensors with purchase of MOSTPLUS 234-4587 oxygen sensors. Bladerunner said: Only use Ford Motorcraft 02 sensors on your mustang. Ford tech Specializing in el. I borrowed a specialty tool from Auto Zone to remove the old one. Part Number: SET-REPF960904-2. 1998 Mustang gt o2 sensor codes question. 1->0. (S197 - 5th Gen - 5. 99. Ford Mustang oxygen sensor simulator will allow you to drive without catalyst and still keep the check engine light off. If the powertrain control module (PCM) detects a level of voltage from an oxygen (O2) sensor that does not correspond to acceptable parameters, the P2254 code is stored. '06 Tungsten GT 18" CT-R Gunmetals. 7-. An O2 sensor voltage above 0. 0L) My car has been idling rough and even dying at when i come to a stop sometimes. my check engine light has been on for about a month now and i have been neglecting to get it checked out. 2/pkg. Naperville, IL. I have a 1997 Cobra with an off road H pipe and am having the following issues. Jun 9, 2014. You are getting codes for the AIR system (smog pump, etc), not the O2 sensors. Actually the passenger side is bank 1 on these motors as the #1 cylinder is the front-most cylinder on the passenger side. I know my o2 sensors are old and crappy, but i dont know how bad they actually are. . "Faking out" an oxygen sensor refers to the process of bypassing the sensor so that the sensor does not relay the correct information to the system's computer. Bank 2 is the group of cylinders that do not contain the number one cylinder; bank 1 is. In some cases, there aren’t any noticeable symptoms of code P0113 other than an illuminated check engine light. 2003 Mustang GT, O2 sensor question, little help please. Use 16 gauge wire for all the wiring and you should be fine. Part Type: Oxygen Sensor Simulators. "Faking out" an oxygen sensor refers to the process of bypassing the sensor so that the sensor does not relay the correct information to the system's computer. 99 2934 posts · Joined 2011. Aug 12, 2009 52 0 0. computer controlled engines. This caused the bank 1 sensor 1 errors that the programmer could not work with. You just reach up and unplug them. This makes it possible for the car to monitor the exhaust more accurately and make the necessary adjustments to ensure the engine is running as efficiently as possible. For example IF an "application" uses a wide band O2 sensor in the front O2 sensor and a narrow band O2 in after cats THEN swapping the O2 sensors would most certainly cause a problem. Sburns015. Driver's side front 02 sensor, bank 1/2 is the rear same side. New o2 sensors use voltage and wavelength pattern. Best Sellers; Clearance; New Products; Open Box;. This article applies to the V6 Ford Mustang (1994-2004). Unfortunately the code is still being thrown. 2/pkg. Locate the ECU fuse within the car. Replacing 4 O4 sensors with no improvement is a big "parts changer" hit to the wallet. #11 · Nov 22, 2010. First Name. They are for f150 which are flex fuel but they work perfect on 5. Gently lower the vehicle back down on the stands. The oxygen sensor in your Ford Mustang, sometimes called an O2 sensor or air-fuel ratio sensor, measures the oxygen level in your exhaust gases. Kevin . FORD MUSTANG, MUSTANG GT, SVT COBRA, MACH 1 MUSTANG, SHELBY GT 500, COBRA R, BULLITT MUSTANG, SN95, S197,. So I put new O2 sensors, upstream and downstream. Sep 11, 2023. This is more of an FYI so others will know that the O2's do a lot on these cars. It has aftermarket exhaust on it causing it to trip the O2 sensor. 99. 6L Tech Status Not open for further replies. Based on what is found in the exhaust gases (as measured by the oxygen sensors), the ECU is then able to adjust the necessary fuel. YE/LB wire goes to the PCM. Ford Mustang Oxygen Sensor - O2 Sensor - Replacement Denso Bosch. #3 · Apr 3, 2007. O2 Oxygen Sensor; Upstream (18-23 Mustang GT w/ Automatic Transmission) $99. Hex Size (mm): 22mm. Check prices & reviews on aftermarket & stock parts for your 2004 Mustang Oxygen Sensor. and i would also run the car for 3 min to warm up the threads and then spray the o2 sensors its self with PB blaster or something similar to. 5. When we we're developing the MIL Eliminators I looked at the front and rear O2's on an NGS. B2 S2. Engine Tuning Information Get the most out of your engine with a performance PCM tune. Would have been better to replace just the front O2 sensors as the rears only monitor the cats. Air Management and Emissions are maintained by an Oxygen Sensor or even a series of Sensors. All Pick Up in Store Ship to Home Sort By: Compare. -Open or short in O2 sensor circuit (wiring, harness) -Fuel pressure or fuel injector problem. 99 (2). 26. CEL eliminator/rear o2 sensors. The oxygen sensor in your vehicle controls the air to fuel ratio. 285 posts · Joined 2014. 7335 posts · Joined 2009. 89 2. codes. The most common is a vacuum leak in the intake manifold on bank 2, in the case of this code. 33,544 POSTS. #1. If you want to check for yourself, measure the distance from the top of one thread on your sensor, to the top of another. 369 posts · Joined 2013. Upstream and Downstream are compatible with the 1999-2010 Ford Mustang GT, Ford Mustang V6; 2007-2010 Ford Mustang GT500. But with the o2 sensor is it as simple as swapping it out for a new one to fix the richness level or is this something that my mods or tune is causing? The other o2 sensor is functioning fine and my rear sensors are turned off (just to answer any loose questions) 2004 Mustang GT 40th Anniversary Bassani o/r x-pipe, Flowmaster 40. 1 - 24 of 5851 results for Oxygen Sensor Compare Refine. E46 ford o2 eliminator. I was wondering if anyone knew which ones these were specifically. Very gently with my gun turned way down and back and forth I finally got the last nut off. In addition to. In Stock. On top of low prices, Advance Auto Parts offers 4 different trusted brands of Oxygen Sensor products for the 2014 Ford Mustang. #8 · May 23, 2007. They have NO function in fuel trim feedback to the PCM. Bapmic Oxygen 02 O2 Sensor Downstream 234-4337 13444 12578459 Compatible with 1996-2004 Chevrolet GMC Cadillac ASG277. 6L) Top. The outside surface of the bulb is exposed to exhaust gas, and since ceramic zirconia is an electrolyte, the conventional O2 sensor literally creates its own voltage as the O2 levels within the bulb and the O2 in the exhaust fluctuate, providing a 0. Well a few days ago I decided to. $69. Find FORD MUSTANG Oxygen Sensors Upstream Oxygen Sensor Location and get Free Shipping on Orders Over $109 at Summit Racing!. Posts. Mustang O2 Sensors will improve both power and fuel efficiency, and help to make sure you don't lose any performance from your Stang's precisely machined engine. 0 Coyote with long tube headers that extends the front O2 sensor leads so they will fit in the header. 1 Year Limited Warranty. 6L. Catalyst, O2 and heated O2 were not ready. 2003 - 2004 SVT Mustang Cobra 2005 - 2010 Mustang GT 1996 - 2004 Mustang GT The Bar Turbo Modular. I have a 2012 Mustang GT and had returned everything back to stock, for the purposes of smog, except the Borla cat back exhaust. #1 · May 28, 2009. 45 . Once you have found the O2 sensors, you will need to follow the green wire that is right on top of each of them. 0L) 1996 - 2004 Mustang GT (SN95 - 4th Gen - 4. Description: Motorcraft Parts are the only parts designed and built to the specific standards of Ford Motor Company and are the only parts. Sometimes you have to watch, the ecu has a keep alive memory function. You will now need to remove the sensor. Estimated to ship. The V6's were OBD-II. Mustang gt sensors 1996 ford 2004 oxygen replace sensor mustangforums o2 step . I'm getting ready to install a wide band and. If one of your sensors goes bad, you could experience numerous issues as a result. What's the year and model. They recommended a new tune to ensure that those sensors are ON. An OBD-II diagnostic scan could return code P0135 due to any of the following causes: High resistance in O2 heater element or O2 heater circuit wiring. 0. 1999-2004. Fog Lamps. 7:1 A/F ratio which corresponds to a Lambda of 1. 5 would be about . The 141 and 161 problem is probably the heater circuit fuse. Your 2195 code for the sensor reading rich can be to blame on one of these issues. However, then they will be off when/if you need an emissions test and will fail that test unless you get an emissions tune for testing. 99. Using the front jack point of the vehicle, jack up the car. P2196 is a generic OBD-II. 3" pushrods, BBK shorties, Crane PS-91 coil, Walbro 155lph fuel pump, FRPP 24# injectors, Kirban AFPR, FRPP 65mm TB, Edelbrock Performer intake,. I suggest getting a tune as well, your engine light might come on with the headers. Pull the excess wire inside the car, and secure the wiring under the hood with zip ties. Since the oxygen sensor plays a key role in maintaining the efficiency of the combustion process, a bad sensor can result in poor fuel economy. Also, these were the results from the code reader: Results from 1st scan: KOEO 111 = "System PASS" Continous Memory 176 = "HEGO (HO2S) sensor fault/always lean" KOER 314 = "(Cars ONLY): Thermactor air system/fault during engine run self-test / left side" 311 = "Thermactor air system/fault during engine run self-test" Results from 2nd. Alrighty, desperation mode engaged. 000 at all rpm's with short term fuel trim read 99. Electrical tests will show if the internal. 223 posts · Joined 2009. P0135 - O2 Sensor Heater Circuit Bank 1 Sensor 1. 99Wiring Harness Length: 17. kow. To remove it, locate the small tab on the end of the plug. 800v). 62 60ft. I think it's for the same reason that some 94/95 5. 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 3. #2. 2004 o2 sensor stuck rich help. it runs great, and even get good gas milage. 0 volt at a rate of approximately 50 cycles per minute. The O2 signal wiring can be 18 gauge. Wide band o2 sensor?. The only solution is to wire up Ford Mustang GT O2 simulator to the o2 sensor’s harness to emulate the exhaust air fuel sensor. (S197 - 5th Gen - 5. Next, insert a long chisel and aim for the honeycomb pattern inside the cat con. Since the oxygen sensor plays a key role in maintaining the efficiency of the combustion process, a bad sensor can result in poor fuel economy. While oxygen sensors are designed to last upwards of 100,000 miles, oxygen sensors will eventually go out over time and will require replacement. Utilize a removal tool at this point. 95. 5. I recommend new O2 sensors only right after the car is tuned up, with no trouble codes, and running right. Another O2 sensor issue!!! need help! Hey everyone! I know this has been beaten to death as I have found a ton of threads on O2 sensor topic. Without O2's, the EEC will TRY to run RICH! It goes into FMEM (failure mode) to *keep the engine running so you can make it to the dealer to get the EFI system fixed*. The first digit in the number is the Bank ID: 1 = bank 1, 2 = bank 2. This does not necessarily mean that the vehicle is running lean (although it can, but usually. WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market. Estimated to ship. (I admit, the only 86 I have owned was a built carbed 351W) 84 20th Anny 2. Check the scan tool if the voltage parameters of the oxygen sensors are below the specified value. Feb 7, 2016. 50+ bought in past month. O2 Simulators, Ford, Mustang, Pair. Now I find that the down stream O2 sensors are NOT coming out of the converters without galling the threads. 62022 Ford Mustang Oxygen Sensor 2021 Ford Mustang Oxygen Sensor 2020 Ford Mustang Oxygen Sensor 2019 Ford Mustang Oxygen Sensor 2018 Ford Mustang. I'm having trouble with my check engine light coming on. This prevents you from having to make any splices or cuts in your factory wiring. #10 · May 21, 2011. They detect the amount of oxygen in the exhaust system and rely on built-in heating elements to reach operating temperatures. Will work on 3 or 4 wire applications. 29 (17) O2 Oxygen Sensor Set; Upstream and Downstream. It will end in a plastic plug inserted into an outlet. 2004 Mustang Parts; 2003 Mustang Parts; 2002 Mustang Parts; 2001 Mustang Parts; 2000 Mustang Parts. BTW this will not effect gas millage or drive-ability/MPG/etc. When I sodered in my MIL Eliminators in my rear O2 sensors last night, I took both sensors out at the same time. Reduction in performance or power. I did add O2 sensor spacers to the rear O2 sensors from Amazon ($10 for both). As was mentioned, the O2 sensors collect oxygen levels in the exhaust. Well, o2 sensor aside, running straight pipes tends to shift the powerband higher into the rpm range. Late Model Restoration has you covered with this Motorcraft O2 sensor. 3 LX running rich, hesitation on acceleration, high and hanging idle Help!Svt 6lMustang o2 eliminator Mustang o2 sensors sensor oxygen gt 2005 6l engine emissions motorcraft lmr eliminators milO2 svt bypass. The two stock front O2 sensors are used by the computer to monitor the air fuel ratio and the rear two are for monitoring the efficiency of the convertors of the the stock H pipe. Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Ford, Jaguar, Lincoln, Lotus,. 80FoxCoupe Well-Known Member. Poor Gas Mileage. 10s, Drag Susp, PMS Tuned by Mike Post. Upper. Using the front jack point of the vehicle, jack up the car. 02 Oxygen Sensor Extender 90 Degree Angle O2 for Downpipe M18 x 1 5 Spacer O2 | eBay. . Find the O2 sensor that needs to be removed. Common causes include a failed oxygen sensor, wiring issues, a rich running condition, and PCM issues. 25@110 naturally aspirated on a bone stock 2V longblock. . Option 1: 2 non-foulers stacked on each other with the top one being drilled 1/2" so the sensor fits in. Finally got my Speed of Sound gauge pod installed, water temp gauge and Raptor shift light hooked up. Thread starter ddrallstar69; Start date Jan 21, 2012; D. The ECM/PCM and the O2 sensor are all about keeping things balanced in the combustion chamber. *Please see product pages for any exceptions. 2005-14 Mustang Complete Wiring Harnesses. This oxygen sensor set helps to keep emissions in check, issuing alerts when it reaches dangerous levels. You should have about . NGK NTK Upstream Left O2 Oxygen Sensor for 1999-2010 Ford Mustang 5. Locate and unplug the wire loom from the rear most oxygen sensors. I just replaced a set of Bosch units in my 2000 Mustang GT after 100k Miles. So, you'll be running open loop. . . 6L Tech. 2004. These are the correct Ford part numbers for a 94-95 Mustang GT with manual transmission. Tuners sold here A/F Oxygen Sensor. The car wont pass emissions here in Illinois because it is saying the heated o2 sensors are 'not ready'. . But you shouldn't need to replace the back O2 sensors if you have the O/R pipes. If your Mustang's check engine light is on, it’s. Fox Body Mustang, Ghia, Turbo GT, SVT Cobra, Cobra Jet, Bullitt, California Special, Cobra, GT, V6, S197, SN95, S550, S650, Dark Horse, F-Series, F-150, Triton, F150 Raptor, Raptor, EcoBoost. Upstream and Downstream are compatible with the 1999-2010 Ford Mustang GT, Ford Mustang V6; 2007-2010 Ford Mustang GT500. 25 would be about . After driving almost 1,100 miles and replacing rear o2’s in desperation, it still wouldn’t clear. Replace the defective oxygen sensor on your 1994-04 Mustang with this Motorcraft replacement! A key element in Mustang air/fuel ratio monitoring, the oxygen sensors are located on the mid-pipe and monitors exhaust gases. Leave your vehicle in the position for about 5 minutes and then reinsert the fuse. If one of your sensors goes bad, you could experience numerous issues as a result. The right side rear O2 sensor will have a white/black and red/light green wire. The upstream O2 sensor controls how much fuel is added to the air/fuel mixture. $34. 25 stands for.