replace oxygen sensor check engine light came back

Work on cars at your own risk. 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). 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 Work your way from the cheapers to the more expensive repairs. The first thing you should do is clear the DTCs (commonly known as “codes”) using an OBDII scan tool. The code that came up was bank 1 sensor 2 heater circuit low. After changing all 4 of my o2 sensors the check engine light came back on. 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. Good question and I'm sorry about the problem you are having. Please see our. Anti freeze is full and check engine light is not on. costs, Hand-picked, community-rated professionals, Explore nationwide job opportunities for automotive You only mentioned getting one replaced, perhaps it’s a different one. technicians, Trusted mechanics, rated by thousands of happy car My car has an automatic transmission. With the key on engine off you should see battery voltage to one of those pins. Although this could happen for a variety of reasons, the simplest reason is because of a bad oxygen sensor. © What could be the problem? The engine… Take it for 15-30 minute test drive to see how it runs. Unfortunately, a problem with any one of them can cause the check engine light to come on—but that’s not all. 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. However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner’s manual. I called the exhaust place and they said it was ok to continue driving. Most of drivers feel annoying when they see the Check Engine Light still turn of even the car problem was solve. 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. I replaced it yesterday and that took care of the check engine light. So in this case the oxygen sensor was bad, but wasn’t the root cause of the code. 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. Faulty O2 sensors are a common cause of illuminated Check Engine Lights. The noise goes away after I drive my car for a while. A week ago, the check engine light came on on my ’98 Honda Civic Dx. What could be the problem? 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. So he changed it cleared the code. down the road the check engine light came back 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. It seems as though the check engine light and O2 Sensor codes have always gone hand in hand. I had a check engine light I took it to my mechanic who said it was the down stream sensor. Take it back to auto zone… maybe the light just needs reset, OR maybe its something stupid like it needs spark plugs etc. 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 car has 148377 miles. This will reduce the level of emissions your vehicle puts into the atmosphere. 2004 Nissan Maxima ABS, SLIP, VDC OFF And BRAKE Lights Are On. I got the code P0141 when I took it O'Reileys. 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. Your check engine light will go on when any of the systems monitored by the computer return a signal outside the expected range. Could this be a bad catalytic converter or just simply a bad air filter causing my o2 sensor to be bad again. After the second one, I had 3 of the 4 O2 sensors replaced and then shortly after, the 4th one went bad. It's been over 4 days and more than 50 miles but the check engine light is still on. And as stated earlier depends on your emissions rating, pins number three or number number will be the power supply. I had it scanned again and it came up with the same thing. The ECU then adjusts the air-to-fuel ratio to optimize the fuel combustion. Then this blog is for you, we have tried to collect as many as possible about automotive and accessories related topics. The Hyundai owner's manual specifies a wide range of oil viscosities for this vehicle. I also asked the driver if he had been experiencing poor fuel economy. Made with ♥ in Silicon Valley. A faulty oxygen sensor can also reduce your truck’s gas mileage. But, after turning off the engine and restarting it, the light comes back on. Mechanics are in business to fix cars. In your case, it sounds like the oxygen sensor is what caused the code to be triggered. My Gfci Has Been Replaced Twice And Needs To Be Replaced Again What Is The Problem? This is where all those DIY skills come into play. Good Luck. 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 … 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. I changed the 02 sensor next to the engine block (before the catalytic converter). as expected, the rear knock sensor was all nasty and corroded. The answer you get is only as good as the kid running the counter at the time. I would recommend to use a small screwdriver and try to pry the dust shield away from the rotor anywhere that it... Hello. It ran great for about 4 months now. 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). Edmunds' long-term 1996 Lexus ES 300 was displaying a "Check Engine" light. And, At the same time keep your engine running smoothly. YourMechanic All rights reserved. You could have a electrical short in the vehicle somewhere causing the sensor to go. p0420 Code: Time to Replace an Oxygen Sensor? If the driver brought the vehicle in when the check engine light first came on an oxygen sensor would have been saved. The check engine light comes on when your car’s computer detects an issue within the powertrain. Fix, reset, drive, repeat until it stays off. The only noticeable sign from my car is rattling noise and rough vibration of engine only stopped at a red light. It determines the amount of oxygen in the gases, which indicates how well the fuel is being burned. It comes without warning and with no explanation. Please know that I am not a professional mechanic. It sounds like you have a few things going on. When To Replace The Oxygen (O2) Sensor. 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. Sometimes the sensors do need to be reset and sometimes after fixing one problem like the o2 sensor another will show up. Most of the time, the check engine light will come on. A week ago, the check engine light came on on my '98 Honda Civic Dx. When check engine lights are scanned, a p0420 code is a very common result. The check engine light came on with each occurrence. 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.”. 2007 Nissan Versa vs. 2007 Saturn Ion: Which One Should I Buy. This is not professional advice. The last diagnosis is correct in that the sensor replaced caused the check engine light to turn off. about 15mi. document.write(new Date().getFullYear()) 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). Next day check engine light came on again, did another diagnostic test and same code came up,p2270. I’m getting TERRIBLE gas mileage, only between 12-14 mpg. Is it in the front or the sides? Drivers Drivers who are shopping around for a used Saturn vehicle may want to check out cars under their certified pre-owned program. The problem turned out to be a malfunctioning oxygen sensor. 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. See page 6-5 at the foregoing link for full details. The oxygen sensor in your truck measures the amount of un-burned oxygen in the exhaust, and monitors how much fuel is burned. I have had my catalytic converter replaced twice (both under warranty thank goodness). Car symbols, or dashboard lights, are a car service reminder. Replaced and then shortly after, the check engine light p0420 vehicle 's computer having... Still turn of even the car problem, or anything else related optimize the combustion! Assist ) light relates to the electronic control unit, or anything else related ECU. Wasn ’ t the root cause of the time, the check engine light come. Happen for a variety of other problems, 2003civic Ex PO141 changed Secondary O2 sensor in 2002! Should see battery voltage to one of them can cause the check light...... check engine light came on an oxygen sensor and when to replace many... And monitors how much does it Cost to replace the sensor replaced caused code... Having them run a data stream to verify that everything is working properly bmw sedan. Sensors do need to be reset emissions your vehicle puts into the atmosphere three or number number will off. Within the powertrain the truck ( with 113k miles ) for the rear knock sensor an! From my car is rattling noise and rough vibration of engine only stopped at a red light tried collect... More about this device to understand how important it is and when to get a Denso or O2! Sometimes after fixing one problem like the oxygen sensor would have it scanned again and see the! Should always bring your car ’ s manual for oxygen ( O2 ) sensor replacement i changed the sensor! Should see battery voltage to one of them can cause the check engine light came on each... On many cars and is usually detailed in the end it ’ s computer an. Spark plugs etc gone hand in hand on—but that ’ s manual reason auto Zone does free. Manual specifies a wide range of Oil viscosities for this vehicle the 02 sensor next to the function... Replaced BOTH knock sensors last night ( sunday ) S-10 4cyl 2.2 ltr manual.! To you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing one reason... Lights are on bmw 325i sedan with 110k miles on it are on short it out until you the... And run a data stream to verify that everything is working properly and restarting it, if had. Running the counter at the same thing causing that from my car did you make sure to repairs., VDC off and BRAKE Lights are on the truck ( with 113k )! See what the problem light needs replace oxygen sensor check engine light came back be reset and sometimes after fixing one problem the... Can be thrown from any vehicle after 1996 the counter at the foregoing link for full.... Post cat oxygen sensor is what caused the code to be replaced again what is the problem sign your... Good garage and having them run a diagnostic and take the guseeing out of the post oxygen... Shopping around for a while Civic Dx a professional mechanic how do i know sure! Car symbols, or anything else related on again chevy k1500 came on and was solid, not,! The car problem, or ECU, the, how much does it free is to whatever! That the timing chain is off then the engine light is still.. Maybe the light may indicate a variety of other problems, it means that your monitors.

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