Go to the nearest auto parts store and ask them to pull your computer codes for you so you can begin to diagnose the problem. So why is the light still on? So, if your converter is marginal, and you did a lot of stop-and-go driving, which creates high demand for the converter, that may have turned on the check engine light. CAR TALK, DEWEY, CHEETHAM & HOWE, SHAMELESS COMMERCE, WARPED DISCS, and CLICK AND CLACK are registered trademarks of Tappet Brothers LLC. The check engine light often comes on because of transitory problems. It has about 135,000 miles on it. But now it won't go out for an entire day. You can sign in to vote the answer. You'll need a can of carburetor spray cleaner, some basic hand tools and a couple hours of your time. Your emissions system is a complicated feature designed to … Tester July 6, 2016, 3:05am #5. Is my catalytic converter sensor still bad? He told me converters usually last about 130,000 miles. We get to the airport at night, pick up the car form the airport parking lot, drive to a hotel, drive the car to a client the next morning, and then go … Important: if you're fixing a problem to pass a smog check, drive your vehicle for a day before taking it for testing. A problem with the emissions system. Go ahead and clean the components suggested and see what that does for you. Don't Ignore That Light Mazor says that some people freak out when they see the check engine light. It's the best car I've ever owned. This can be annoying, cause you to fail an emissions (smog) test, or keep you from finding out about future problems the vehicle's computer might be trying to alert you to. Your car goes into limp-home mode. Contents © 2020 Tappet Brothers LLC. The light is off because the PCM moves the information about the fault to history, and continues checking the problem… Why are car lights made to be left on when you remove the Key? http://www.freeautomechanic.com/iac-idle-air-contr... http://www.youtube.com/watch?v=35gCXuqzbow. But the check engine light was on with the engine code of P0770 (transmission solenoid) Knowing that a re-built tranny might be in the cards I was sweating it. After a few driving trips, the light should turn off … One option is to turn the ignition on and off 3 times in a row. Pros and Cons of Diesel Engines Have Changed over Time, Mind the Gap When Changing Out Spark Plugs. Spark plug/ignition coil issues. Light seems to come on few hours after I refuel even though I make sure to tighten the gas cap. Do Check Engine Lights Ever Turn off by Themselves? Since around 100 k miles, my car's check engine light has been flickering or staying on and then going off on its own after a cold start. Light seems to come on few hours after I refuel even though I make sure to tighten the gas cap. If you wonder … Your light is TELLING you that your AIR/FUEL mixture is going OFF KILTER. When a test fails, the check engine light may come on. The vehicle is emitting emissions which are higher than the Environmental Protection Agency mandates, and that is why the check engine light is on. Rather than ignore it, have it checked for the code(s) when it comes on. CLeaning the IAC is the BEST insurance to keep O2 sensors and conveerter CLEANED UP!!! The IAC fine tunes the most, and usually COLLECTS engine sludgy vapors from POOR oil choices that are WAX based. And it’s getting on your nerves. Drive the vehicle and see … It's never a good idea to ignore a Check Engine Light, but if you've identified the problem to be a minor issue such as a loose gas cap, the light may go off once the cap is tightened. Try running some fuel injector cleaner through it, either Seafoam or Techron, they are much more expensive that normal, but thats because they work. By latching the fault, it is stored and in some cases the "check engine light" also referred to as the MIL (malfunction indicator light) will remain lit after repair until certain conditions are met. Use A Scan Tool. One day I got in the car and before I put the key in the ignition there was a clicking noise inside the car and the check engine light went … No, the fact that the light went out on it's own really means nothing. If check engine light goes off on its own, does it mean it's not serious? Chances are that you’ve had your check engine light issue fixed BUT the light is still on! If you then did a bunch of highway driving before changing the oil, the specs may have dropped back into the normal range, causing the light to go off. A check engine light will shut itself off if the condition that caused it is remedied. Several of us travel to and from various towns to work there, and we use a leasing company that leaves cars in these towns for us. The “EPA requires the light be [in] operation, which means a key on the light should illuminate [bulb check] and then turn off once the engine is running,” Rudloff wrote. Three weeks later, after I changed my oil, I noticed that the check engine light was off. Do this first. He told me the sensor for the catalytic converter is bad (about $400), and the catalytic converter also might be bad (another $600). At 135,000 miles, it's very likely that you need one. Get in the Zone. Or was the mechanic just looking for a $1,000 job? I have access to a group least car through work. A lot of readers and scanners are set up to access only generic OBDII codes. So, if your converter is marginal, and you did a lot of stop-and-go driving, which creates high demand for the converter… If your gas cap is not properly attached, you may see a "Check Engine" light or a "Loose Cap" warning light on the dash. And, at some point soon, it'll stay on -- and then you won't be able to pass inspection. In the US except California Auto Zone and many other chain auto parts stores will read the codes for free in hopes they can sell you something to fix it. The AutoZone Fix Finder. The best way to start on this is to do some basic cleaning per the attached links. We start a new drive cycle and if the test that turned the light on does not run the MIL may turn off. Switching the ignition on and off. how do those parking lot crash videos happen where it just looks like they are flooring the accelerator. MOBIL ONE 0W-30 is USUALLY the right choice for MOST older car engines. A few months ago, my check engine light went on. At first, I would tighten the gas cap and it would go out in a few minutes. I don't think the oil change had anything to do with it. What do you think? This can result in curing whatever reason the initial code was generated. Do check engine lights turn off after a while? How do you think about the answers? Most car computers will reset themselves after a certain number of "drive cycles" but the problem is still there and still recorded in the car's computer. Would like to know WHAT year, make, model, engine size and country of origin your car IS!!!! But it... its been my experience that the older cars start developing carbon on the oxygen sensors, usualy from using the cheaper grade gasolines, and that causes the check engine lights to start in, but there are a number of reasons the light can come on, low oil, low oil pressure, ect...I would definately have it checked, just because it has been going on for some time doesnt mean you are not damaging the engine. If it is on when u go to inspection, your car will not pass The light could go off on its own if the problem fixed itself and there is anough time for it to pass it's selftests enough The technician can tell if you recently (within 50 miles or so) deleted the code. ''The answer is Yes. You can either tighten the cap and wait for the system to reset itself when it … Still have questions? Did the light burn out? Sometimes the light flickers upon driving before warm, once the gas is let up, the light either stops flickering, or continues to flicker and then remains on for a few days, then goes off on its own. My prediction is that the light is going to come back on again, if it hasn't already by the time you're reading this. Question: My check engine light came on and was steady (not flashing) for about a week without any apparent engine issues. I'm the original owner of a 2002 Toyota RAV4. And if you're lucky, you won't need to replace the converter itself until after next tax season. Sometimes your check engine light won’t turn off even after you’ve fixed the problem with your vehicle. The conditions … On the way home the check engine light went off on its own. Best case would be that the problem disappears without you having to spend hundreds of dollars to find the problem. Once you have the codes, don't just buy the components suspected. No it means its intermittent and in no way is an indication of severity. When the problem is fixed, the engine light does not always turn off. http://www.youtube.com/watch?v=eQpPcdvSBks&NR=1&fe... http://www.ehow.com/list_7541495_signs-bad-pcv-val... http://www.ehow.com/facts_5980898_symptoms-bad-egr... http://www.wikihow.com/Clean-Your-EGR-Valve, http://minimopar.knizefamily.net/idleproblems.html, http://www.youtube.com/watch?v=gd640ImE9Ec, http://www.youtube.com/watch?v=NRIDW0xRmYo, http://www.youtube.com/watch?v=HC7udHCq1yM&NR=1. The check engine light is your car’s way of alerting you that something's amiss — but it could be as minor as a loose gas cap, or more serious, like a faulty oxygen sensor. At first, I would tighten the gas cap and it would go out in a few minutes. A check engine light will shut itself off if the condition that caused it is remedied. No, the fact that the light went out on it's own really means nothing. So is this something to worry about or can be ignored since it goes out on its own? Then, drive your vehicle around and check to see if the light goes off. -- Russell 1993Chevy s10 won't go into 1st gear sometimes it will then won't was stuck in traffic then shifted .What could BE WRONG? Most vehicle manufactures also have their OEM cod… I wouldn't go blowing that income tax refund on the director's cut of "Bikini Car Wash II" just yet, Russell. Couple months ago, check engine light suddenly started illuminating. In such cases, the light should go off by itself after a short time. The car was running fine, but after two weeks of staring at the light, I took it to a mechanic. At the very least, your car will run better. Once the cap is put back on and a drive cycle occurs where the computer can detect that everything is good, the light will go off. I needed to have some other work done and had the oil pan dropped to have the gasket replaced because of an oil leak. He will collect his $24.95 and tell you to come back again. Test them to determine if they are faulty. Or in other words, the cross-counts of the O2 sensor are starting to slow down. It was not my fault; they just need to be replaced after around 130,000, give or take. When some car system fails to pass a test the check engine light turns On. Maybe it cost you a fortune. In some cases, a failing or faulty TPS can cause the engine to go … Dear Tom and Ray: Junkyards are FULL of sludged up ruined engines with bad sensors. It takes 3 failures for the light to turn on. The light will go off, but the code will remain in the computer until cleared … Using a scan tool is the easiest way for check engine light reset. But now it won't go out for an entire day. Allowing a bad oxygen sensor can cause your vehicle to get extreemly poor gas milage, not to mention dumping fuel which causes excesive carbon build up ruing your valves, or it can cause it to run lean, meaning it doesnt get enough gas and thats even worse, it can overheat your engine, burn the viscosity out of your oil and blow the engine up. If it is an "evap" code it won't cause any harm, but replacing the gas cap with an OEM cap (many aftermarket gas caps are real junk) is a good thing to do. Can Check Engine Light Turn Itself Off? Get your answers by asking now. Most car computers will reset themselves after a certain number of "drive cycles" but the problem is still there … No, because when I turn the key to start the car, I see it light up. NEVE get CHEAP oiol change bargain oils.You do NOT know what they are using. Put simply, an ignition coil generates the electricity the spark plugs … If the error causing the light stops for some reason, the light will turn off and the computer will enter into a … So I decided to wait till I got my income tax refund. The best thing you can do when your check engine light comes on, even if it goes off again shortly thereafter, is to take your car into a mechanic to get it checked out or to invest in your own … This isn’t enough to set off a check engine light or cause a noticeable running issue, but can contribute to poor fuel economy. The simple answer here is that if yourcheck engine light is on, even if no code is generated, then there is something going on with the engine. Take $20 to the local QUICKY lube, and have them clean your THROTTLE BODY, PCV, and IDLE AIR CONTROL VALVE to SHOWROOM clean. This does not suggest we have solved the problem. This light displays itself when the onboard computer system recognizes an electrical or mechanical problem with your vehicle. When you know which components the computer suspects, get on the internet and find the test procedure for each one. Cartalk.com is a production of Tappet Brothers LLC d/b/a Dewey, Cheetham and Howe. Fix Finder is an easy-to-use tool to troubleshoot why your Check Engine Light … The car was running fine, 20 mpg as always. After your car has failed to … Here’s something you … If your check engine light is on when you show up, it's … The problem could be that the O2 sensor is starting to become lazy. By far, the best way to reset the check engine light is to fix the problem that the … Finding out why your Check Engine Light is on may help you save gas and avoid more problems down the road. But it does goes out within a day. One of the possible ways to reset the check engine light is to wait and let it go … My car is 10 years old and has 200,000 miles. A check engine light will shut itself off if the condition that caused it is remedied. If they test ok, you'll need to dig a little deeper to find out what caused the fault code to appear. I think what's happening is that your oxygen sensor or the catalytic converter itself is on the verge of failing. While your car is motionless, turn the ignition … According to Consumer Reports, blinking … The scan tool is an easy way to get a response to queries about whether the check engine light will reset itself. Fix the Problem. Transmission fluid check 48 hours after service ? These things FINE TUNE your air/fuel mixture under COMPUTER controls. I know several auto parts stores allow you to use their diagnostic tool, its easy to use too, just plug it in and tell it to read, Im sure someone there can explain it to you, or atleast find someone who knows how and get it done. So when the light comes back on, take the car, and the tax refund, back to your mechanic and have him try an oxygen sensor. Couple months ago, check engine light suddenly started illuminating. 7. Let it Go Off Itself. When that happens, you’ll need to manually reset the light. First of all, is the light blinking or steady? Join Yahoo Answers and get 100 points today. Fla. police raid home of COVID-19 whistleblower, Florida governor accused of 'trying to intimidate scientists', Another mystery monolith has been discovered, 'B.A.P.S' actress Natalie Desselle Reid dead at 53, Ivanka Trump, Jared Kushner buy $30M Florida property, MLB umpire among 14 arrested in sex sting operation, Actress opens up on being sexualized as a child star, 'Thugshots' Christmas tree draws backlash in Alabama, Heated jacket is ‘great for us who don’t like the cold’, The 'red line' that's hindering stimulus talks, Issue of hotel payments to follow Trump out of office. 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