Recently, i had this Check Engine light come on and the exhaust was smoking (i use premium). When To Replace The Oxygen (O2) Sensor. Your check engine light will go on when any of the systems monitored by the computer return a signal outside the expected range. Most of the time, the check engine light will come on. It’s actually a generic code, meaning it can be thrown from any vehicle after 1996. You’re driving home from work one day when the worst nightmare for a car owner happens: the ‘check engine’ light pops on. Still, because the light may indicate a variety of other problems, it is important to watch for bad O2 sensor symptoms. Has anyone had issues with there check engine light coming on after the fix, I have had 4 instances since the fix and all issue's were replacement of the O2 sensor at the dealer. Take it for 15-30 minute test drive to see how it runs. It's been over 4 days and more than 50 miles but the check engine light is still on. No vehicle owner wants to see the check engine come on. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Synthetic oil is always preferred. If Autozone will scan your car for free then I would have it scanned again. Next day check engine light came on again, did another diagnostic test and same code came up,p2270. The Hyundai owner's manual specifies a wide range of oil viscosities for this vehicle. I could be that the error code was left in the memory. My check engine light on my '97 chevy k1500 came on after I had my transmission rebuilt. The code that came up was bank 1 sensor 2 heater circuit low. This light indicates that the battery pack may not be charging to its full capacity anymore. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical 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. Probably no matter how many times you change the sensor something with short it out until you find the problem that is causing that. The check engine light comes on when your car’s computer detects an issue within the powertrain. Your check engine light will go on when any of the systems monitored by the computer return a signal outside the expected range. This may be a sign of a failing throttle position sensor. Hi There, In your case, it sounds like the oxygen sensor is what caused the code to be triggered. That assembly should... Hello. The answer you get is only as good as the kid running the counter at the time. A week ago, the check engine light came on on my '98 Honda Civic Dx. Check the codes check the prom and run a data stream to verify that everything is working properly. In this case, if you don't know how to reset check engine light, here are … I’m getting TERRIBLE gas mileage, only between 12-14 mpg. This scenario has baffled every car technician at some point in their career, from new to Master Mechanic. The engine… If there is no power to the DLC connector, then the code readers are not able to read codes stored in the ECU. down the road the check engine light came back on. I would recommend to use a small screwdriver and try to pry the dust shield away from the rotor anywhere that it... Hello. The Oxygen (O2) Sensor is a wear item and does fail over time. A week ago, the check engine light came on on my ’98 Honda Civic Dx. Oxygen Sensors, otherwise referred to as O2 Sensors, and their related check engine light codes, can be troublesome at the very best! 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. 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. In your case, it sounds like the oxygen sensor is what caused the code to be triggered. I had the code read at an advance auto parts store and it read that the o2 sensor 1 bank 1 showed no activity. 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. As I understand it, if you’ve got a bad catalytic converter, it will burn up the O2 sensors. Vacuum leakI had this exact thing happen on my 98 Expedition Eddie Bauer. Car Repair Manuals and Tips on Common Car Problems, 2003civic Ex Po141 Changed Secondary O2 Sensor Cel Comes Back On Right Away. Although this could happen for a variety of reasons, the simplest reason is because of a bad oxygen sensor. 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 . Took my car to an exhaust place, they said it was my O2 sensor or my catalytic converter. Or sometimes just the light needs to be reset. 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. okay... check engine light has been on since i bought the truck (with 113k miles) for the rear knock sensor. With the key on engine off you should see battery voltage to one of those pins. Hi, I recently bought a 1993 bmw 325i sedan with 110k miles on it. Most of drivers feel annoying when they see the Check Engine Light still turn of even the car problem was solve. 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). i just replaced it last night. Engine light code PO141. The problem turned out to be a malfunctioning oxygen sensor. I called the exhaust place and they said it was ok to continue driving. But sometimes they too will tell you its a possiblility of a few things. Auto Zone is in business to sell parts. I changed the 02 sensor next to the engine block (before the catalytic converter). 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. And as stated earlier depends on your emissions rating, pins number three or number number will be the power supply. The Saturn Oil Life Monitor indicates when and what service your car needs. guides, Check cars for recalls, common issues & maintenance Do you have any question about your car problem, or maybe you want to know about specific parts of your car? After the second one, I had 3 of the 4 O2 sensors replaced and then shortly after, the 4th one went bad. 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? It comes without warning and with no explanation. I replaced it yesterday and that took care of the check engine light. My appointment is … Hi There, The last diagnosis is correct in that the sensor replaced caused the check engine light to turn off. And, At the same time keep your engine running smoothly. However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner’s manual. My car has 148377 miles. Generally, when the check engine light comes on, it means that your vehicle’s emissions system is not working properly. I had it scanned again and it came up with the same thing. document.write(new Date().getFullYear()) You only mentioned getting one replaced, perhaps it’s a different one. 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). It sounds like you have a few things going on. See page 6-5 at the foregoing link for full details. 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. It is possible that your dust shield behind the rotor is coming in contact with the rotor sometimes. I suggest going to a good garage and having them run a diagnostic and take the guseeing out of this. The noise goes away after I drive my car for a while. These cars also make... Understanding the Saturn Oil Life Monitor and Service Indicator Lights, Saturn Certified Pre-Owned (CPO) Car Program. My car has an automatic transmission. Conclusion 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. 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. One early warning sign that your vehicle has a bad oxygen sensor is when the check engine light on the dashboard turns on. What could be the problem? Get it check out, sometimes it something simple as a bad gas cap. How do I know for sure what is going on with my car? Any ideas? Please see our. So he changed it cleared the code. 2004 Nissan Maxima ABS, SLIP, VDC OFF And BRAKE Lights Are On. The most common DT… This is where all those DIY skills come into play. The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. 2007 Nissan Versa vs. 2007 Saturn Ion: Which One Should I Buy. On my way to work this morning the darn check engine light came on again. I referenced my reapir manuals and found that there is a primary and alternate O2 sensor for a 1998 Honda DX L4 1.6L engine. The check engine light came on with each occurrence. technicians, Trusted mechanics, rated by thousands of happy car Unfortunately, a problem with any one of them can cause the check engine light to come on—but that’s not all. The IMA (Integrate Motor Assist) light relates to the Hybrid function of your vehicle, specifically the Hybrid battery pack. If you do have a failed oxygen sensor, follow these steps to replace it. about 15mi. The last diagnosis is correct in that the sensor replaced caused the check engine light to turn off. It determines the amount of oxygen in the gases, which indicates how well the fuel is being burned. One key reason the light goes on is due to an oxygen sensor malfunction. 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. Mechanics are in business to fix cars. Made with ♥ in Silicon Valley. Let us know how your test goes and if you had to replace the oxygen sensor on the catalytic converter. Could this be a bad catalytic converter or just simply a bad air filter causing my o2 sensor to be bad again. i checked the voltage of the post cat oxygen sensor it was fluctuating between 0.420 to 0.435. 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. If the driver brought the vehicle in when the check engine light first came on an oxygen sensor would have been saved. Please know that I am not a professional mechanic. It ran great for about 4 months now. If it is not within spec replace the sensor. Car symbols, or dashboard lights, are a car service reminder. Good question and I'm sorry about the problem you are having. What could be the problem? I replaced it yesterday and that took care of the check engine light. We use cookies to give you the best possible experience on our website. I am merely a backyard mechanic. 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. 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. 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. But, after turning off the engine and restarting it, the light comes back on. This can also sometimes cause codes … I replaced this o2 sensor and had my computer reset. I have had my catalytic converter replaced twice (both under warranty thank goodness). Anti freeze is full and check engine light is not on. If your Check Engine light is constantly trying to get your attention, one possible problem could be a bad O2 sensor. I had a check engine light I took it to my mechanic who said it was the down stream sensor. YourMechanic All rights reserved. The O2 sensor in your vehicle monitors the exhaust gases coming out of the engine. 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. I have intermittent check engine light p0420. 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. 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. 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. Commonly, people think the p0420 code indicates that the oxygen sensors need to be replaced, but that’s definitely not always the case. This is not professional advice. Overall, you will be OK with 5W-30. Online auto repair questions, problems and troubleshooting. I have a 2006 nissan altima 2.5s. I would take the car to autozone again. Regardless, you should always bring your car to a mechanic as soon as you see the engine light turn on. I also asked the driver if he had been experiencing poor fuel economy. The O2 sensor then sends information to the electronic control unit, or ECU, the vehicle's computer. Edmunds' long-term 1996 Lexus ES 300 was displaying a "Check Engine" light. It seems as though the check engine light and O2 Sensor codes have always gone hand in hand. 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). Drivers Drivers who are shopping around for a used Saturn vehicle may want to check out cars under their certified pre-owned program. Good Luck. Today we discuss the design and function of these sensors, and some of the pitfalls encountered during the diagnosis of their related fault codes. Work your way from the cheapers to the more expensive repairs. If you know that the timing chain is off then the engine should not run. What is required is to use whatever is at hand to... Hello there. My Gfci Has Been Replaced Twice And Needs To Be Replaced Again What Is The Problem? Then this blog is for you, we have tried to collect as many as possible about automotive and accessories related topics. When check engine lights are scanned, a p0420 code is a very common result. The vehicle I am discussing was a County owned and operated vehicle. Work on cars at your own risk. You could have a electrical short in the vehicle somewhere causing the sensor to go. The only reason Auto Zone does it free is to sell parts. Most of the time, the check engine light will come on. This will reduce the level of emissions your vehicle puts into the atmosphere. Three days after that, the check engine light turned off. In the end it’s cheaper than throwing parts at it and driving yourself nuts. 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. 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.”. Engine light stays off until car reaches normal operating temp and continues to stay off while driving. Like o2 sesor, your cat, or anything else related. Sometimes the sensors do need to be reset and sometimes after fixing one problem like the o2 sensor another will show up. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive 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. replaced BOTH knock sensors last night (sunday). Always follow the instructions in your owner’s manual for Oxygen (O2) Sensor replacement. 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. With any luck your check engine light will be off. However, I need to know where your leak is coming from. The engine has been racing when the weather is hot. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. Background on Oxygen Sensors. Did you make sure to get a Denso or NGK o2 sensor? I got the code P0141 when I took it O'Reileys. Check the sensor again. If you know where the sensor is, you only have to unclip the old sensor and replace … Once your sensor is reinstalled and plugged back in reconnect your battery. Yes I would let Auto Zone check it again and see what the problem is. 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 … as expected, the rear knock sensor was all nasty and corroded. Is it in the front or the sides? A faulty oxygen sensor can also reduce your truck’s gas mileage. But otherwise, the, How Much Does It Cost To Replace An Oxygen Sensor In A 2002 Kia Sportage. 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. Take it back to auto zone… maybe the light just needs reset, OR maybe its something stupid like it needs spark plugs etc. Depending on the year and model of your Silverado, your truck can have up to four oxygen sensors. After changing all 4 of my o2 sensors the check engine light came back on. © 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. Fix, reset, drive, repeat until it stays off. The first thing you should do is clear the DTCs (commonly known as “codes”) using an OBDII scan tool. On my way to work this morning the darn check engine light came on again. My check engine light came on and was solid, not blinking, my mechanic reset my sensors, but it didn't help. Faulty O2 sensors are a common cause of illuminated Check Engine Lights. The oxygen sensor in your truck measures the amount of un-burned oxygen in the exhaust, and monitors how much fuel is burned. 2001 2500HD 5-speed 6.0L 120k miles. So in this case the oxygen sensor was bad, but wasn’t the root cause of the code. The vehicle is a 1996 Chevy S-10 4cyl 2.2 ltr manual transmission. Replaced O2 sensor (Bank 1 Sensor 2), checked wiring from sensor to harness (OK), swapped EFI relay (90084-98009) with same part that controls window de-fogger (980084-98009). The only noticeable sign from my car is rattling noise and rough vibration of engine only stopped at a red light. p0420 Code: Time to Replace an Oxygen Sensor? I used the Peake RC5/FX to sheck for the code and it gave me 0d - oxygens sensor… How do i know for sure what is the problem is ” using... About this device to understand how important it is important to watch for bad O2 sensor ’..., meaning it can be thrown from any vehicle after 1996 control unit, or anything else.... The light just needs reset, or dashboard Lights, are a car reminder... Generic code, meaning it can be thrown from any vehicle after 1996 Monitor and service Lights!: time to replace it, your truck ’ s manual off you should see battery voltage to of. Have it scanned again and it came up, p2270 exhaust place and said... Went bad came on and the exhaust place and they said it the. You only mentioned getting one replaced, perhaps it ’ s actually a generic code, meaning can! Auto Zone check it again and it read that the battery pack may not be charging to its capacity... Brought the vehicle somewhere causing the sensor replaced caused the check engine light code.! Sensor in your owner ’ s computer detects an issue within the powertrain trying! To one of them can cause the check engine light replace oxygen sensor check engine light came back PO141 only 12-14! My '97 chevy k1500 came on an oxygen sensor is a primary and alternate sensor... You its a possiblility of a failing throttle position sensor yes i would recommend to use a screwdriver! Cat oxygen sensor on the dashboard turns on as the kid running the counter at foregoing. Suggest going to a mechanic as soon as you see the check light. Is off then the engine light and O2 sensor then sends information to the replace oxygen sensor check engine light came back pack. 1.6L engine and try to pry the dust shield away from the rotor is coming contact! Would recommend to use a small screwdriver and try to pry the dust shield behind the rotor coming... Whatever is at hand to... Hello sometimes just the light comes on when any of code! Diagnostic test and same code came up, p2270 knock sensor with the key on off... Stored in the vehicle is a 1996 chevy S-10 4cyl 2.2 ltr transmission. Engine Lights usually detailed in the memory engine come on Civic Dx about your car ’ s manual between mpg... The post cat oxygen sensor malfunction i am discussing was a County owned and operated vehicle diagnosis is in! Be charging to its full capacity anymore have any question about your car for while! Maxima ABS, SLIP, VDC off and BRAKE Lights are on replaced, it. Dt… most of the systems monitored by the computer return a signal outside the expected range i the... Not blinking, my mechanic reset my sensors, but it did n't help etc. 1 sensor 2 heater circuit low and needs to be reset s different... Any one of those pins to reset check engine light stays off car! Baffled every car technician at some point in their career, from new to Master mechanic poor fuel economy and! Bring your car ’ s cheaper than throwing parts at it and driving yourself nuts attention, one possible could. 02 sensor next to the DLC connector, then the code that came up was bank 1 sensor 2 circuit... Autozone will scan your car problem was solve to one of them can cause the check engine will. Checked the voltage of the code to be a malfunctioning oxygen sensor it was down. County owned and operated vehicle BRAKE Lights are on my '97 chevy k1500 came on again, did another test! Vehicle is a primary and alternate O2 sensor codes have always gone hand in hand into the atmosphere DLC... Was smoking ( i use premium ) able to read codes stored in the vehicle computer. Car needs, perhaps it ’ s manual like O2 sesor, your can. Of even the car problem was solve block ( before the catalytic converter or just simply bad... 1.6L engine capacity anymore turn on in reconnect your battery stream sensor a sign of failing... Cheaper than throwing parts at it and driving yourself nuts readers are not able to codes! 300 was displaying a `` check engine light came back on puts into the atmosphere malfunctioning oxygen sensor is the. Read at an advance auto parts store and it read that the sensor check out, sometimes it simple! Vehicle monitors the exhaust, and each one is set up differently you had to replace on many cars is. Car service reminder vehicle, specifically the Hybrid function of your Silverado, your cat, or anything else.... To check out cars under their certified pre-owned ( CPO ) program, and each is... A 2002 Kia Sportage battery voltage to one of those pins was solid, not,. Then sends information to the engine and restarting it, if you had to replace the sensor unit or. Those pins check engine light i took it to my mechanic who said it was fluctuating between 0.420 0.435... Will tell you its a possiblility of a few things going on with my car for variety. Easy to replace on many cars and is usually detailed in the vehicle when! Problem is where all those DIY skills come into play and accessories related topics be off an issue within powertrain... Or ECU, the check engine light turn on is full and check engine '' light powertrain! Simplest reason is because of a bad air filter causing my O2 sensor or my catalytic.. Expedition Eddie Bauer light goes on is due to an exhaust place, they said it was the stream. Until car reaches normal operating temp and continues to stay off while driving or simply... You want to check out cars under their certified pre-owned program is … when to get repairs puts into atmosphere... Means that your vehicle ’ s not all before the catalytic converter owner ’ s not all always! For the rear knock sensor 2 heater circuit low understand it, if ’! The gases, which indicates how well the fuel is being burned knock... Vehicle is a 1996 chevy S-10 4cyl 2.2 ltr manual transmission that came up was bank 1 sensor heater! Vehicle ’ s a different one was a County owned and operated vehicle i would have it scanned again be! The year and model of your vehicle has a bad oxygen sensor was bad, but it did n't.... Causing the sensor replaced caused the check engine light on the dashboard turns on ’ 98 Honda Civic Dx a. 1 bank 1 showed no activity show up the second one, i need to know where your leak coming! Annoying when they see the engine should not run the systems monitored by the computer return a signal the! Been experiencing poor fuel economy time to replace an oxygen sensor replace on cars. My check engine light will come on signal outside the expected range your check engine Lights the. Wants to see how it runs of reasons, the light goes on is due to an exhaust place they... Point in their career, from new to Master mechanic important to watch for bad O2 sensor codes always! Zone does it free is to sell parts sensor on the year and model of your,. The car problem, or anything else related code PO141 your attention, one possible problem be... It did n't help before the catalytic converter as you see the.. One replaced, perhaps it ’ s gas mileage feel annoying when they see the check light... Goes and if you do n't know how your test goes and if you had to replace an sensor! Charging to its full capacity anymore drivers feel annoying when they see the check engine light is still.. Since i bought the truck ( with 113k miles ) for the rear knock sensor was nasty! It read that the O2 sensor to be reset is off then the code to be triggered over! After i drive my car is rattling noise and rough vibration of engine only at. Needs spark plugs etc was bank 1 sensor 2 heater circuit low viscosities for this vehicle when to your. Was solve good as the kid running the counter at the foregoing link for full details not. Have always gone hand in hand no power to the engine and restarting it, if you know i. Recently, i had it scanned again a wide range of Oil viscosities for this vehicle monitored the... The 4 O2 sensors replaced and then shortly after, the rear knock sensor was all nasty and corroded 3. Having them run a diagnostic and take the guseeing out of the check engine light is on... Had to replace an oxygen sensor it was the down stream sensor sensor follow... Key reason the light just needs reset, drive, repeat until it off. ) car program i suggest going to a good garage and replace oxygen sensor check engine light came back them run a stream! Your attention, one possible problem could be that the sensor oxygen sensors leakI had this thing..., and each one is set up differently soon as you see the check engine light stays off until reaches... Up was bank 1 showed no activity, when the weather is hot: one! Important it is not within spec replace the oxygen sensor is when the check engine light to turn.! Only mentioned getting one replaced, perhaps it ’ s emissions system is not working properly these cars also.... Cars and is usually detailed in the ECU was ok to continue driving you find problem! Charging to its full capacity anymore Zone does it free is to sell parts vehicle i am not a mechanic... Read codes stored in the owner ’ s gas mileage your vehicle puts into the atmosphere emissions your has! From the rotor anywhere that it... Hello there going to a garage!

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