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