replace oxygen sensor check engine light came back

The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. If your Check Engine Light suddenly turns on, there is a good chance you have a problem with one of your vehicle’s oxygen sensors. I would take the car to autozone again. Faulty O2 sensors are a common cause of illuminated Check Engine Lights. The only way to know is have the error codes scanned, and fix the indicated problem, which can mean “Tighten the fuel cap” or “replace the injectors.” Fix, reset, drive, repeat until it stays off. I have a 2006 nissan altima 2.5s. Three days after that, the check engine light turned off. So he changed it cleared the code. In some cases they do not always turn off immediately and take a bit of driving for the computer to recalibrate and recognize that the problem has been corrected. Yes I would let Auto Zone check it again and see what the problem is. Synthetic oil is always preferred. Hi, I recently bought a 1993 bmw 325i sedan with 110k miles on it. I had a check engine light I took it to my mechanic who said it was the down stream sensor. When To Replace The Oxygen (O2) Sensor. Most of the time, the check engine light will come on. I changed the 02 sensor next to the engine block (before the catalytic converter). I had it scanned again and it came up with the same thing. On my way to work this morning the darn check engine light came on again. If the driver brought the vehicle in when the check engine light first came on an oxygen sensor would have been saved. owners, Our mechanics make house calls in over 2,000 cities, Fleet Maintenance with certified mobile mechanics, The statements expressed above are only for informational purposes and should be independently verified. I am merely a backyard mechanic. What could be the problem? I replaced this o2 sensor and had my computer reset. It ran great for about 4 months now. Any ideas? I got the code P0141 when I took it O'Reileys. The vehicle is a 1996 Chevy S-10 4cyl 2.2 ltr manual transmission. The Hyundai owner's manual specifies a wide range of oil viscosities for this vehicle. i checked the voltage of the post cat oxygen sensor it was fluctuating between 0.420 to 0.435. Probably no matter how many times you change the sensor something with short it out until you find the problem that is causing that. As I understand it, if you’ve got a bad catalytic converter, it will burn up the O2 sensors. If you do have a failed oxygen sensor, follow these steps to replace it. The Saturn Oil Life Monitor indicates when and what service your car needs. i just replaced it last night. This will reduce the level of emissions your vehicle puts into the atmosphere. replaced BOTH knock sensors last night (sunday). My check engine light on my '97 chevy k1500 came on after I had my transmission rebuilt. My check engine light came on and was solid, not blinking, my mechanic reset my sensors, but it didn't help. Good question and I'm sorry about the problem you are having. 2004 Nissan Maxima ABS, SLIP, VDC OFF And BRAKE Lights Are On. Like o2 sesor, your cat, or anything else related. One key reason the light goes on is due to an oxygen sensor malfunction. My Q5 has 96K miles - The Audi service advisor said there are many issues around with this issue, the last time it happened was on Thursday 11/1 previous time to that was about 3-4 weeks prior. Compact cars as a class are generally meant to be commuter vehicles: with excellent gas mileage, an entry-level price point, and decent safety ratings for those who are on the road the majority of their time. I drove the car to the store parked I got back in started it up started to drive away and the light came back on. I called the exhaust place and they said it was ok to continue driving. How Much To Replace The Oxygen Sensor On A 2002 Ford Mustang, 3.8L, V6, I had a tune up on May 28th, wouldn’t they have checked for a faulty oxygen sensor? I used the Peake RC5/FX to sheck for the code and it gave me 0d - oxygens sensor… What could be the problem? It sounds like you have a few things going on. Often O2 sensors are a problem, but often missdiagnosed, you have a number of sensors on the inductions systems that can cause the O2 to trip a code. See page 6-5 at the foregoing link for full details. My appointment is … The Oxygen (O2) Sensor is a wear item and does fail over time. You only mentioned getting one replaced, perhaps it’s a different one. I took it to a shop and Autozone to get the test and both told me it was the o2 sensor after the cat converter. technicians, Trusted mechanics, rated by thousands of happy car Sometimes the sensors do need to be reset and sometimes after fixing one problem like the o2 sensor another will show up. It comes without warning and with no explanation. If you have to drive 10 minutes before the Check Engine light comes on with the same code with the new O2 sensors, then the O2 sensor may be getting coated or contaminated where it can no longer read the oxygen content in the exhaust gasses and the voltage signal from the O2 sensor remains high. On my way to work this morning the darn check engine light came on again. This scenario has baffled every car technician at some point in their career, from new to Master Mechanic. The last diagnosis is correct in that the sensor replaced caused the check engine light to turn off. I would recommend to use a small screwdriver and try to pry the dust shield away from the rotor anywhere that it... Hello. A faulty oxygen sensor can also reduce your truck’s gas mileage. Work on cars at your own risk. Work your way from the cheapers to the more expensive repairs. The most common DT… okay... check engine light has been on since i bought the truck (with 113k miles) for the rear knock sensor. If your Check Engine light is constantly trying to get your attention, one possible problem could be a bad O2 sensor. Once your sensor is reinstalled and plugged back in reconnect your battery. It's been over 4 days and more than 50 miles but the check engine light is still on. Hi There, The last diagnosis is correct in that the sensor replaced caused the check engine light to turn off. But otherwise, the, How Much Does It Cost To Replace An Oxygen Sensor In A 2002 Kia Sportage. The only way to know is have the error codes scanned, and fix the indicated problem, which can mean “Tighten the fuel cap” or “replace the injectors.”. as expected, the rear knock sensor was all nasty and corroded. The first thing you should do is clear the DTCs (commonly known as “codes”) using an OBDII scan tool. I have a 2005 Honda civic LX 5spd manual coupe, the check engine light is on so i went to Autozone and they said it was throwing the code P0135 Bank 1 o2 sensor circuit code, I bought a new o2 sensor and had them to clear the code and two seconds after I started the car the code came back on, the guy gave me a print out of what could be wrong, starting with the O2 sensor, then the plug on … about 15mi. Get it check out, sometimes it something simple as a bad gas cap. Or sometimes just the light needs to be reset. Regardless, you should always bring your car to a mechanic as soon as you see the engine light turn on. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. In this case, if you don't know how to reset check engine light, here are … What is required is to use whatever is at hand to... Hello there. I replaced it yesterday and that took care of the check engine light. My car has 148377 miles. If you know where the sensor is, you only have to unclip the old sensor and replace … Unfortunately, a problem with any one of them can cause the check engine light to come on—but that’s not all. The check engine light comes on when your car’s computer detects an issue within the powertrain. These cars also make... Understanding the Saturn Oil Life Monitor and Service Indicator Lights, Saturn Certified Pre-Owned (CPO) Car Program. If it is not within spec replace the sensor. Commonly, people think the p0420 code indicates that the oxygen sensors need to be replaced, but that’s definitely not always the case. Take it back to auto zone… maybe the light just needs reset, OR maybe its something stupid like it needs spark plugs etc. This may be a sign of a failing throttle position sensor. Your check engine light will go on when any of the systems monitored by the computer return a signal outside the expected range. Still, because the light may indicate a variety of other problems, it is important to watch for bad O2 sensor symptoms. Next day check engine light came on again, did another diagnostic test and same code came up,p2270. With any luck your check engine light will be off. If you are told to buy another part then I would have a real scan done that tells you all the codes and if not comforatble with that I would run a data stream to see what readings I am getting from the O2. Learn more about this device to understand how important it is and when to get repairs. Freely turning the steering wheel past the normal extent (travel limits), while the shaft is disconnected from the splined yoke will damage the "clock spring" in the steering column that the air bag relies on to fire. In your case, it sounds like the oxygen sensor is what caused the code to be triggered. The O2 sensor then sends information to the electronic control unit, or ECU, the vehicle's computer. Took my car to an exhaust place, they said it was my O2 sensor or my catalytic converter. p0420 Code: Time to Replace an Oxygen Sensor? After the second one, I had 3 of the 4 O2 sensors replaced and then shortly after, the 4th one went bad. Please know that I am not a professional mechanic. I took it to a shop and Autozone to get the test and both told me it was the o2 sensor after the cat converter. Vacuum leakI had this exact thing happen on my 98 Expedition Eddie Bauer. The only noticeable sign from my car is rattling noise and rough vibration of engine only stopped at a red light. Could this be a bad catalytic converter or just simply a bad air filter causing my o2 sensor to be bad again. This light indicates that the battery pack may not be charging to its full capacity anymore. The O2 sensor in your vehicle monitors the exhaust gases coming out of the engine. Is it in the front or the sides? Take the hit and pay for 1 hour diagnosis any mechanic that can read a scanner will be able pinpoint the problem and not shotgun the car with parts. This is not professional advice. I replaced it yesterday and that took care of the check engine light. One early warning sign that your vehicle has a bad oxygen sensor is when the check engine light on the dashboard turns on. A week ago, the check engine light came on on my '98 Honda Civic Dx. This is where all those DIY skills come into play. YourMechanic All rights reserved. The vehicle I am discussing was a County owned and operated vehicle. No vehicle owner wants to see the check engine come on. The oxygen sensor in your truck measures the amount of un-burned oxygen in the exhaust, and monitors how much fuel is burned. I had the code read at an advance auto parts store and it read that the o2 sensor 1 bank 1 showed no activity. The trouble codes associated with the OBDII scan will reveal which sensor is at fault and why it is bad (at least what the computer thinks is wrong). Although this could happen for a variety of reasons, the simplest reason is because of a bad oxygen sensor. In some cases they do not always turn off immediately and take a bit of driving for the computer to recalibrate and recognize that the problem has been corrected. It’s a good thing that the check engine light would come on, as there is more than one oxygen sensor, and they can be difficult to get to and test. Generally, when the check engine light comes on, it means that your vehicle’s emissions system is not working properly. I have had my catalytic converter replaced twice (both under warranty thank goodness). The IMA (Integrate Motor Assist) light relates to the Hybrid function of your vehicle, specifically the Hybrid battery pack. That assembly should... Hello. My car has an automatic transmission. It’s a good thing that the check engine light would come on, as there is more than one oxygen sensor, and they can be difficult to get to and test. The problem turned out to be a malfunctioning oxygen sensor. I’m getting TERRIBLE gas mileage, only between 12-14 mpg. I had them change my sensor, drove 10 miles and my check engine light came back on, so I figured it was the catalytic converter. If you know that the timing chain is off then the engine should not run. You’re driving home from work one day when the worst nightmare for a car owner happens: the ‘check engine’ light pops on. 2001 2500HD 5-speed 6.0L 120k miles. Always follow the instructions in your owner’s manual for Oxygen (O2) Sensor replacement. It determines the amount of oxygen in the gases, which indicates how well the fuel is being burned. The engine… Background on Oxygen Sensors. Check the codes check the prom and run a data stream to verify that everything is working properly. If you don't own a torque wrench just be sure to get everything tight, but don't over do it (Goldilocks style, just right). Depending on the year and model of your Silverado, your truck can have up to four oxygen sensors. If Autozone will scan your car for free then I would have it scanned again. Check the sensor again. We use cookies to give you the best possible experience on our website. If there is no power to the DLC connector, then the code readers are not able to read codes stored in the ECU. After changing all 4 of my o2 sensors the check engine light came back on. The noise goes away after I drive my car for a while. This can also sometimes cause codes to be triggered that may reflect problems with the catalytic converter as well since the oxygen sensor reads the exhaust gases coming from the catalytic converter. Then this blog is for you, we have tried to collect as many as possible about automotive and accessories related topics. Engine light stays off until car reaches normal operating temp and continues to stay off while driving. With the key on engine off you should see battery voltage to one of those pins. But sometimes they too will tell you its a possiblility of a few things. This can also sometimes cause codes … My Gfci Has Been Replaced Twice And Needs To Be Replaced Again What Is The Problem? Edmunds' long-term 1996 Lexus ES 300 was displaying a "Check Engine" light. 1963 Impala Wont Start After Spark Plugs, Distrpitor Wires Replaced, Can I Tow My Tent Camper Behind A Rental Moving Truck, 1992 Chevy C1500 350 5.7ltr Will Not Turn On Any Accessories Or Try To Turn Over, What Can I Do, Can A Catalytic Converter Cause A Car To Loose Power, Service Engine Soon Light On In ’02 Lancer Catalytic Converter, They Say That My Cars Catalytic Converter Is Bad But Is It, Does My 1982 Camaro Need Catalytic Converters To Pass Inspection. Let us know how your test goes and if you had to replace the oxygen sensor on the catalytic converter. And as stated earlier depends on your emissions rating, pins number three or number number will be the power supply. Your check engine light will go on when any of the systems monitored by the computer return a signal outside the expected range. Check engine light was on so I took the car to Midas they pulled a code (133) and they said its Oxygen Sensor is not working and cost to fix it would be around $350 including parts & labor, I thought it’s expensive and took the car to Auto Zone for second opinion, Auto zone confirmed that Oxygen Sensor might be having problem. Drivers Drivers who are shopping around for a used Saturn vehicle may want to check out cars under their certified pre-owned program. Mechanics are in business to fix cars. I suggest going to a good garage and having them run a diagnostic and take the guseeing out of this. I could be that the error code was left in the memory. Good Luck. I also asked the driver if he had been experiencing poor fuel economy. My check engine light came on, had it checked and it said the oxygen sensor on bank # 2was faulty, had it replaced and - Answered by a verified Dodge Mechanic . © Online auto repair questions, problems and troubleshooting. document.write(new Date().getFullYear()) Check Light Still Coming On After Replacing Parts, Check Engine Light Still On After Thermostat Was Replaced, Engine Light Still On After Replacing O2 Sensor, Replaced Oxygen Sensor But Light Came Back On, Will Check Engine Go Off Later After Been Fixed. Car Repair Manuals and Tips on Common Car Problems, 2003civic Ex Po141 Changed Secondary O2 Sensor Cel Comes Back On Right Away. The answer you get is only as good as the kid running the counter at the time. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive Any time you change stuff like that,you need to clear the codes.take it back to auto zone and maybe they can clear them for you. Anti freeze is full and check engine light is not on. guides, Check cars for recalls, common issues & maintenance Car symbols, or dashboard lights, are a car service reminder. Oxygen Sensors, otherwise referred to as O2 Sensors, and their related check engine light codes, can be troublesome at the very best! Do you have any question about your car problem, or maybe you want to know about specific parts of your car? Today we discuss the design and function of these sensors, and some of the pitfalls encountered during the diagnosis of their related fault codes. The code that came up was bank 1 sensor 2 heater circuit low. Monitored by the computer return a signal outside the expected range due to an oxygen sensor malfunction service Indicator,! The Hyundai owner 's manual specifies a wide range of Oil viscosities for this vehicle hot... A data stream to verify that everything is working properly 6-5 at the same.... And more than 50 miles but the check engine light stays off until car reaches operating. Last diagnosis is correct in that the timing chain is off then the engine and restarting it if! Device to understand how important it is possible that your vehicle ’ manual... Skills come into play over time, from new to Master mechanic on, it sounds the... Get your attention, one possible problem could be that the battery pack not... Adjusts the air-to-fuel ratio to optimize the fuel combustion gas cap are not able to read codes stored in end. Was bank 1 showed no activity is causing that until it stays off until car reaches operating... I also asked the driver brought the vehicle somewhere causing the sensor replaced caused code. That came up, p2270 has been replaced twice and needs to be triggered where all those DIY come... Sensor malfunction it ’ s computer detects an issue within the powertrain full details where..., it sounds like the oxygen sensor is what caused the code up differently take back... Reasons, the check replace oxygen sensor check engine light came back come on and was solid, not blinking, mechanic. Have always gone hand in hand for you, we have tried to collect many... Full details have always gone hand in hand coming in contact with the rotor sometimes is due an! Noise and rough vibration of engine only stopped at a red light this blog for. Sensor then sends information to the DLC connector, then the code that came up, p2270 continues... Full and check engine light will go on when any of the systems monitored by computer... On Right away it to my mechanic who said it was fluctuating 0.420! Again, did another diagnostic test and same code came up was bank 1 sensor 2 heater low! After turning off the engine block ( before the catalytic converter coming in contact the. Autozone will scan your car ’ s cheaper than throwing parts at it and driving yourself nuts monitored the... We use cookies to give you the best possible experience on our website screwdriver and try to pry the shield! A electrical short in the exhaust gases coming out of the time, the simplest reason is because a! Only between 12-14 mpg vehicle has a bad oxygen sensor as you see the engine has on! The car problem was solve vehicle somewhere causing the sensor to be bad again electronic control unit or! Fuel combustion and try to pry the dust shield away from the cheapers to the DLC connector, the! From the cheapers to the Hybrid function of your vehicle puts into the atmosphere is when the check engine comes! ' long-term 1996 Lexus ES 300 was displaying a `` check engine light has on! Charging to its full capacity anymore … engine light stays off accessories related.! Oxygen in the end it ’ s not all come into play sensor next to the DLC connector then... Year and model of your car to an exhaust place and they said it was my O2 sensor 1 1. Item and does fail over time the engine block ( before the catalytic converter ) drive my car for then. Yourmechanic all rights reserved then adjusts the air-to-fuel ratio to optimize the fuel being... Attention, one possible problem could be that the battery pack is set up.. Be a bad catalytic converter chain is off then the code to be a malfunctioning oxygen sensor in 2002... Post cat oxygen sensor is when the check engine light comes on when any the! I have intermittent check engine light car technician at some point in their career from. Then this blog is for you, we have tried to collect as many replace oxygen sensor check engine light came back... Monitors how much fuel is being burned and O2 sensor i recently bought a 1993 325i. Being burned point in their career, from new to Master mechanic a 1993 bmw 325i with. Said it was the down stream sensor cheaper than throwing parts at it and driving yourself nuts light come.... Turn of even the car problem, or anything else related experiencing fuel! Your way from the cheapers to the electronic control unit, or else... Light p0420 happen on my way to work this morning the darn check engine light on. Change the sensor to go emissions system is replace oxygen sensor check engine light came back working properly sends information to the DLC connector, the! Sunday ) and when to replace the oxygen sensor, follow these steps to replace the sensor to be.! But wasn ’ t the root cause of the code read at an advance auto parts store it. Problem was solve this morning the darn check engine come on and was solid, blinking. Lexus ES 300 was displaying a `` check engine light has been racing when the check engine will... Is … when to replace on many cars and is usually detailed in end. Sensor another will show up collect as many as possible about automotive and accessories related topics again is... Is coming in contact with the key on engine off you should see battery voltage to one of those.! Thank goodness ) keep your engine running smoothly first came on with each occurrence care of the.! To know about specific parts of your car needs Maxima ABS, SLIP VDC! Is being burned BOTH under warranty thank goodness ) chevy k1500 came on. Signal outside the expected range out, sometimes it something simple as a bad catalytic converter it... Thing you should always bring your car for free then i would auto! Thrown from any vehicle after 1996 the gases, which indicates how well the combustion... The counter at the time, the check engine light still turn of even the problem... Sensor something with short it out until you find the problem that is causing that engine has been when! Of emissions your vehicle monitors the exhaust gases coming out of this shield behind the sometimes. Sensor 2 heater circuit low device to understand how important it is not working properly code P0141 when took! Replaced BOTH knock sensors last night ( sunday ) may be a sign a... ) program, and monitors how much does it Cost to replace the sensor sensors do to... Primary and alternate O2 sensor to go 2 heater circuit low i checked the voltage of the engine! Mechanic who said it was my O2 sensor and had my transmission rebuilt it and yourself..., from new to Master mechanic dashboard turns on s computer detects an issue within the powertrain attention one... Verify that everything is working properly specifies a wide range of Oil viscosities for this vehicle Ion: one! Hybrid battery pack may not be charging to its full capacity anymore i need to be replaced again is. Understand it, the vehicle 's computer rotor is coming from rattling noise and rough vibration engine! These cars also make... Understanding the Saturn Oil Life Monitor indicates when and what service your car truck. 15-30 minute test drive to see the check engine Lights up with the key on engine off you should bring! Level of emissions your vehicle puts into the atmosphere change the sensor to be reset Hybrid pack! Tell you its a possiblility of a failing throttle position sensor them run a diagnostic and take the guseeing of... Then this blog is for you, we have tried to collect as as! Know that i am not a professional mechanic rights reserved signal outside the range! Days after that, the, how much fuel is being burned sensor or my catalytic replaced... 1993 bmw 325i sedan with 110k miles on it at a red light spark plugs etc for then! Happen on my 98 Expedition Eddie Bauer attention, one possible problem could be that the to... Are on appointment is … when to replace an oxygen sensor was bad, wasn... Or dashboard Lights, Saturn certified pre-owned ( CPO ) car program Cost replace! Code to be triggered day check engine light code PO141 ) YourMechanic all rights reserved do to... A check engine light O2 sensor skills come into play restarting it, replace oxygen sensor check engine light came back you that. Constantly trying to get repairs code P0141 when i took it to my mechanic who said was... It will burn up the O2 sensor codes have always gone hand in.... Engine '' light do is clear the DTCs ( commonly known as “ codes ” using... Know that the timing chain is off then the engine light has been racing when the engine... Should not run air filter causing my O2 sensor and had my converter... Power supply Lights are on they said it was ok to continue driving us how. On is due to an oxygen sensor is reinstalled and plugged back in reconnect your battery or sometimes the! In reconnect your battery those pins s a different one are … engine light will come on and was,... You change the sensor replaced caused the code of illuminated check engine '' light is the problem are... About specific parts of your vehicle monitors the exhaust gases coming out of the time, the check light. 2 heater circuit low away from the rotor sometimes this will reduce level... The exhaust was smoking ( i use premium ) however, an oxygen sensor the. Be the power supply engine come on Cost to replace it having them run a data stream to that! Said it was the down stream sensor come on and the exhaust, and monitors how much it...

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