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Check Engine Light
The check engine light comes on in a car when the engine is experiencing a problem. Ask questions here about your car's check engine light.
7,238 Questions
How does the abv valve make a tcs system malfunction on a 2001 Mazda millenia supercharged?
tcs is part of a separate control unit(tcm) attached to the main pcm. when there is a problem with abv, the pcm stops communicating with tcm(transmission control module), and the car is put in "limp home" mode(tcs off/tcs lites illuminate, car will not rev above 2500). quite common in the 2.3, generally, a vacuum line problem. you probably also have codes p1525/26 and/or 1540. first fix the vacuum lines, change out the tees and the lines(about 21 feet), next would be the vacuum/vent solenoids in the back of the engine. one or both of those generally fixes this problem
Saturn Vue 2003 service engine soon light is on?
Take a look here askville.amazon.com/service-engine-light-wrong-saturn-Vue-2003/AnswerViewer.do?requestId=3645084
How do you reset the service light on an Opel Corsa 2005 1.6 Sport?
There's no great ''trade secret'' as to how to reset the service indicator lamp on most Vauxhall's, simply refer to pages in the Owner's Handbook! For reference of those interested in such matters, but who might not have access to an owner's manual, this is the procedure to follow: Vauxhall service reset * Turn Ignition Off * Hold Trip Reset In * Turn Ignition On Still Holding * Trip Reset wait for three dashes * Turn off Ignition * Turn on Ignition to confirm To the best of my knowledge, the above service light reset procedure applicable to most Vauxhalls HOPE THIS SAVES YOU PAYING FOR INFORMATION!!!!!!!!!!!!!!!!!!!! ;-)
How do you reset the Check Engine Light on a 1992 Toyota Corolla?
One user's answer
There are three ways to shut off the "Check Engine Light" discount battery (not recommended): use a scan tool and delete code, or wait 40-80 key cycles, depending what the code was set for.
Now, if you discount the battery for around 5 minutes, the Check Engine Light will come off, BUT all memory will be lost. Therefore, the vehicle would have to "relearn" new criteria/values.
It will come back on as soon as the symptoms are seen again and you won't pass emissions. A scan tool is a decent way (only if vehicle was fixed), BUT when you delete a code, you erase freeze frame data (and, of course, the code itself) making it harder for the next tech to fix the problem.
Finally, the best way is key cycles - AKA warm-up cycles. If the car is properly repaired after 40 (type B misfire) or 80 (type A misfire), if the PCM doesn't see the problem occur, it will automatically erase the code.
Another answer
The easiest and fastest way to reset an engine light on any OBD Toyota (OBD1=95 and older / OBD2=96 and newer), is simply this: Pop your hood, and look for the under-the-hood fuse box. Now look on the fuse cover for a fuse labeled "EFI" and pull that fuse out. Now turn the key to "On," but don't start the engine.
Every computer-controlled Toyota has a memory cell in the computer; by pulling the fuse, you are cutting the power supply to the computer. Turning the key on drains the memory cell, so after the key has been on for a minute or two, turn the key off, replace the fuse, and - drum roll!! - the light is out. Be aware, though, if it was more than a hiccup in the system and you haven't corrected the cause of the problem, your light will come back to visit.
All true and accurate. OBDII became mandatory on all vehicles sold on or after 01Jan1996 in the United States, the OBDII Port must be within three feet of the driver and require no tools to access. But Toyota was a bit ahead and had it as early as 1993, in 1994 model~year cars, the Camry, Lexus, for example and others
How do you reset the check engine light on a 1997 Kia Sephia?
you can only reset it with an OBDII diagnostic code reader.
I recently replaced the battery in my '97 Sephia, and took it in to get inspected. They said that because my battery had been replaced that morning, the computer had reset and I would have to drive it for about 75 miles to reset the codes (if present). So I drove it a while and took it back, and it was ok. I tried that the next time the check engine light came on, and the light went away (for about 75 miles, then the computer reset and it came back on). If you have recently acquired this car, you'll find out that the check engine light and the associated problems are common with '97 Sephia's. Good Luck!
If you reset the code for the check engine light and it comes back on after a while of driving that means that you just reset the code not fixed the problem. You will have to goto someone who has a tech to that they can hook upi to your computer and there will be a code that will come up and the mechanic should be able to tell you what is wrong.
The " check engine light" is by far one of the most misunderstood technological advances It is a warning light that is illuminated when there is a problem affecting the EMISSIONS of the vehicle.. Don't let it bother you as it is a good thing once you understand it. One point that was brought up a recent meeting of technicians was that the amount of hydrocarbons is greater when the gas cap is left off than when the engine is running. Hydrocarbons are part of pollution emitted as gasoline evaporates. Going a step farther, one facet of the emission system is the "Evaporative" portion. This is when the fumes from the gasoline are leaking from the system into the outside air. This is one part of the emission system that can trigger a check engine light. I would say a small percentage of the vehicles that have a check engine light are the result of a loose or inadequate gas cap. But understand that many scenarios are possible with the "check engine light" The vehicle's powertrain computer (note that some vehicles have multiple computers aside from the powertain computer) will run a series of self-tests. They will only run under certain criteria. And they are different from manufacturer to manufacturer. Some self-tests or �monitors� are not run until preceding ones have run successfully. So if there is a problem in one particular area that is preventing another self test from running, you can have a situation where one problem is fixed, but another still exists. If you fix a problem and drive the car through a drive cycle that sets the monitor (or self test) the light will go off as it passes that criteria that triggered it in the first place. There are many different sources for the light to come on. Anything that caused combustion to fail, commonly called a misfire will set the light. Various sensors such as oxygen sensors that evaluate the exhaust before and after the gases are burned in the converter. Transmission codes may set the check engine light to appear. If the car is running okay, get it fixed in a reasonable amount of time such as within the month. It will probably save you fuel if you do. However if the Check engine light is flashing, you should be driving it as damage is being done to the converter. Some emission components are covered beyond the standard warranty. The converter for example is covered up to 80,000 miles by the manufacturer. After 1996, the auto industry went to a idea called OBD II (on board diagnostics). This was to get all the manufacturers onto a similar plane for troubleshooting and powertrain control. While they still differ, many corrections and adaptations were made for technicians to better fix the check engine light problems. Prior to this there were so many different and poor troubleshooting data from a check engine light problem that resolving the problem was much more difficult. Many early warning light of this nature were set to illuminate based on mileage. An Oxygen sensor was one of the things that were meant to be replaced when that mileage was hit. This is much like many current "Change oil lights� that are set based on a pre-set mileage. To start testing for the check engine light, you�ll need to find the codes from the computer, match the code to the troubleshooting procedure, follow the procedure to find the source. Repair the source, light will go out if that was the only problem. There are "monitors" or self tests the computer runs the car through a drive cycle, if a problem occurs, it may not run all of the self tests until that problem is taken care. There are self-tests for the oxygen sensor circuit, egr system, evaporative system to name a few. Therefore, another problem may exist. It is emission related.
OR hook up a scanner that is capable of clearing codes, and hope that it won�t come back on. But don�t bet on it. Lastly, disconnecting the battery in some cars will clear the memory of the computer and may temporarily turn the light off. Beware that this may also cause other problems such as the car not rembering it�s idle and will have to relearn it, the radio may be rendered inoperative or in the case of the new Toyotas, the air bag can blow.
After you reinstall and tighten the gas cap, the light should go off after a few driving cyles if this is what caused the light to come on.
Go to Autozone... they have a scanner that can reset the lite.
Simply disconnect your battery. This will reset the check engine light. If it wasn't the gas cap causing the error or if the cap is faulty, it will come back on. In that case you'll need to determine the code that is causing the light to come on. Some vehicles can flash the code using one of the lights on the dash. First you have to initiate it by turning the ignition switch on the off in a certain sequence. Unfortunately, I don't know if this works with Camry's.
the last guy is correct but you cant make the code flash by turning the key. its obdII and there is no way to get a code without a scantool.
How do you reset the check engine light on a 1991 Honda Accord SE?
With my '91 EX, you must either take the car to the dealer and have them reset it after they fix the problem, or fix the problem yourself and just give it a few days to reset itself. To turn it off without fixing the car, disconnect the negative battery terminal for thirty seconds with the car off and reconnect it again. Your light will probably come back if you choose this method though.
It is a safety feature mechanism. It recognizes that drives hard enough to break the engine so it looses power until it is shut off. It then believes a more responsible person starts the car so it goes back to normal. Why are you trying to blow your engine??? Can't say why, not familiar with the term "120kmh". However, You may have been warned, by the light, not to "stay at 4krpm 110-120kmh" or not to "downshift rev hard". It could be that the emission sensors are overloaded by the down shifting and the computer can't maintain the power. The computer may be telling you, via the warning light, to KNOCK IT OFF!
How do you reset the Service Engine Soon light on an 1990 Olds Toronado?
Why is the check engine light flashing on a 1998 forester?
when a check engine light is flashing on any car means that there is a very strong miss fire that could damage the cat.
http://wiki.answers.com/Why_is_Engine_light_flashing_vw_golf_1999&action=edit
How do you reset VE commodore check engine light?
I disconnected the battery and left doors open. I was thinking it would drain the capacitors. I left it for about 30 minutes. The check engine light was off and the warning on the dash disappeared.
Sounds like your engine is suffering a common problem with the 3.8's - an intake leak caused by some bad 'isolator' bolts.
See "Related Questions" below for much much more about this problem
How do you turn off the maintenance required light on a 2004 Fiat Punto 1.9 JTD?
- I have an '03 Civic and I have the REAL answer right here. There's a couple of steps to follow, so here we go: 1: put the key in the ignition. Don't turn the car on or turn it. 2: next to the odometer is that little knob for the trip OD. press that in and hold it.(you'll have to hold this for the entire rest of the process, so I hope you ate your Wheaties this morning) 3: now turn the key two clicks to the II position. (are you still holding the trip button down?..you had better be..) do not actually start the car. 4: keep holding the trip button down and leave the key at the II position until the maint req'd light goes out. 5: don't get all excited. Keep that trip button pushed down while you turn the key back two clicks back to off and take the key out. 6: Ok Ok, NOW you can let go of the button. All of you that answered before, your hearts are in the right place. But the Hondas have changed since the 90s. I had an old Accord, and yes it had the little button that you can push right on the dash. But the new Hondas are reset differently. As far as I know, the proceedure I gave just now will work with any Honda, not just the Civic.
- I have a 02 civic and the only thing I did differently was start with the key in the #1 position.
- I have a 05 civic and the process above worked like a charm. (Just wanted people to know that the process works on 05 civics too)
- I have a '97 accord and on the dashpanel, by the mileage/tripomemter is a small black box like thing, the key for the car fits right in and resets the light. Look in your manual, it will say in there for sure or contact the dealer, they should know. I know the '97 accord light comes on after so many miles have passed, and most places that aren't the dealer do not reset it so it will come on and I usually reset it myself.
- I have the same problem and although I haven't tried this yet, I read in another forum that you should press and hold the select/reset button; then turn the ignition on and hold until the light goes out (about 5 seconds).
- It's easy to do. The instructions are in your manual (page 65). It's different for 4 and 6 cylinder models. I have a 6. Here's how to reset the 2003 6: 1) Put the key in the ignition without turning. 2) Press and hold the odomoter reset button. 3) Turn the ignition key to the on position without starting the car, continuing to hold the reset button. 4) Hold the reset button until the light goes out - approx. 10 seconds.
- Take it to the auto parts or the dealer if it is not in your book and have them reset it with the computer, or disconnected your battery.
- Disconnecting your battery for a few seconds is a quick and simple way to reset the trouble codes in the computer.
- I have a 2000 Honda civic, all I do is use a pen or key and push in the the slot beside the maintenance light. Not sure if you have that but you just hold it down and it flips itself.
- I was lookin for the owners manual in this customers car and couldn't find it but your directions worked for my customers 00 Civic 4 cylinder also. NOTE Disconecting the Battery does not work and will also not reset almost any light in Cars that are newer then 1996 from what i have found. (OBD2 Systems)
- Attention, when you disconnect the battery you may reset the radio anti-theft code and if you don?t know it you get into more trouble.
- Ok first off the battery disconnecting "thing" does work but you have to disconnect both terminals and touch them together for 10-15 seconds for it to work. And I seem to se alot of people just wanting to turn the maintenance light off, it says maintenance required i suggest you get your maintenance done, that's why it's there. And for any of the non-car type people out there if you take your car to any dealer they will tell you waht need to be done and why the light is on free of charge... at least i know i would at my dealership. It's not that hard. Oh and as for the radio lock code it is again a simple phone call away for any dealer and you should not be charged for it. If someone is telling you otherwise then you should ask for the service manager or shop forman and they will get it done for you.
- The solution for the 2003 V6 did work, Thanks. The dealer stated at least for a 2003 Accord this light will reappear every 7500 miles.
How to reset 2002 civic maintenance required light?
This information is listed in your owner's manual. Don't have one, then get one. Sources are, Dealer, E-Bay, Salvage Yard, Google Search. ------------------------------------------------------------------------------------------------------- Who ever wrote that statement up there is a complete #$@#$ !! Well the maintenance light is quite simple to get rid of actually... first the car must be turned off. Second turn the key to on (DO NOT START THE CAR) you know where ALL your lights on the dashboard turn on, so do that. Now push and hold the odometer stick until you see the "maintenance rq'd" light turn off... this may take a few seconds. Thanks to my incredibly intelligent wife. She figured this out on her own.
How do you reset the check engine light and turn the airbag light off on a 2001 VW Golf gti?
Pull the codes from the computer, match the code to the troubleshooting procedure, follow the procedure to find the source. Repair the source, light will go out if that was the only problem. There are "monitors" or self tests the computer runs the car through a drive cycle, if a problem occurs, it may not run all of the self tests until that problem is taken care. Therefore, another problem may exist. It is emission related. OR hook up a scanner that is capable of clearing codes, and hope that none are still active. Disconnecting the battery can create other headaches and will not likely solve your dilemma. Best bet is to contact the local snap-on dealer and have him refer you to a known good shop that specializes in this technology-he will know. The " check engine light" is by far one of the most misunderstood technological advances by the public. This is an needed in-depth understanding for the public. It is a warning light that is illuminated when there is a problem affecting the EMISSION SYSTEM only. Emission system being the pollution control system. Don't get a hard on against it as it is a good thing once you understand it. One point that was brought up a a recent meeting of technicians was that the amount of hydrocarbons is greater when the gas cap is left off than when the engine is running. Hydrocarbons are part of pollution emitted as gasoline evaporates. Going a step farther, one facet of the emission system is the "Evaporative" portion. This is when the fumes from the gasoline are leaking from the system into the outside air. This is one part of the emission system that can trigger a check engine light. I would say that about 7% of the vehicles that have a check engine light are the result of a loose or inadequate gas cap. But understand that many scenarios are possible with the "check engine light" The vehicle's powertrain computer (note that some vehicles have 17 different computers) will run a series of self-tests. They will only run under certain criteria. And they can be vastly different from manufacturer to manufacturer. Some self-tests are not run until preceding ones have run successfully. So if there is a problem in one particular area that is preventing another self test from running, you can have a situation where one problem is fixed, but another still exists. If you fix a problem and drive the car through a drive cycle that sets the monitor (or self test) the light will go off as it passes that criteria that triggered it in the first place. After 1996, the auto industry went to a idea called OBD II (on board diagnostics). This was to get all the manufacturers onto a similar plane for troubleshooting and powertrain control. While they still differ vastly, many corrections and adaptations were made for technicians to better fix the check engine light problems. Prior to this there were so many different and poor troubleshooting data from a check engine light problem that resolving the problem was much more difficult. Many early warning light of this nature were set to illuminate based on mileage. An Oxygen sensor was one of the things that were meant to be replaced when that mileage was hit. This is much like many current "Change oil lights
What does it mean by my Ford Windstar engine is running lean?
Starting at the beginning...
The engine burns a combination of fuel and air - in fact, gasoline will not even burn all by itself, it requires the presence of some air.
The engine computer controls the mixture / ratio of how much air and how much gas is perfect at any given time.
All those sensors that you find all over today's car are feeding information to the computer - things like the temperature of the air, the barometric pressure, the temperature of the engine coolant, how much oxygen is in the exhaust, and so on.
Based on all this information, the computer will adjust the mixture to more fuel, or less fuel, more air or less air.
Sometimes the computer gets it wrong based on something is starting to go wrong with some part of the system.
Another situation that is very common that results in the mix being wrong is when air is sneaking into the system, bypassing the sensors in a way the computer doesn't know the extra air is even there.
When you hear the term "vacuum leak", that's a reference to air sneaking in through a broken rubber hose, a seal that has hardened and shrunk, or a dozen other situations.
When there is too much fuel in the mix = "rich condition".
Not enough fuel, or conversely, too much air = "lean condition".
- Lean condition is more common than rich
- Lean condition trouble codes:
- 171 - Bank 1 (backside row of engine cylinders - by the windshield)
- 174 - Bank 2 (front row of engine cylinders)
This concludes the first lesson in Air/Fuel Mixtures 101
See "Related Questions" below for more...
Why car diagnostic scanner shows the code P0404 what does that mean?
You have a problem with the EGR system.
Where is the evap system purge and vent solenoids located on 2004 Chevy silverado HD?
The EVAP vent valve/control solenoid is mounted on a bracket by the fuel tank.
The EAVP purge valve/control solenoid is mounted on the front top of the intake manifold. Just behind the area where the throttle housing bolts to the front of the intake. It has an electric wires connected to it.
How do i Turn off check engine light on a 1992 Saturn sc?
there are 2 ways to do that. 1. you take off the + side of the batt and wait 30 secs that should turn it off for a little while. 2. if your check engine light is on that means you have a problom with your emissions. there is two sensers on your exhaust one of those might be bad or both of them are bad. or your catilactic converter is clogged . once you fix one of those probloms it should be fixed
Why would both the Check Engine Soon and Slip lights come on simultaneously on a 2000 Nissan Maxima?
It sounds like one of your ABS wheel slip detectors got disconnected or became bad. Slip is detected by thes detectors on each weheel - if there is a difference between them it will alarm the slip light.
Answerif you get the slip, tcs and SES..it means you need an o2 sensor Answerhad the same problem , turned out be a bad ignition coil, seems the computer gets mixed signals when engine miss fires,replaced coil slip light went out AnswerI have this same problem with my 2000 Max. Annoying because the slip and tcs and ses lights come on after the car is started and the car has not moved. I have not fixed the problem yet. Researching the cause and it seems there are lots of posts in the internet incriminating the ignition coils. Will changing the coils solve this problem ? AnswerI had a same problem with my 2000 Nissan maxima. I have replaced all 6 coils.I also have the same problem, has anyone tried changing the Fuel pump?
P0302 Cylinder 2 Misfire Detected P0303 Cylinder 3 Misfire Detected I suggest you replace all spark plugs, and plug wires. When you purchase the plugs and wires, tell the parts store the codes and ask them to reset the light after you install the parts. See where you stand after the repair. I would also run a compression test on all cylinders to see if you possibly have a burnt valve or blown head gasket, which is unlikely, unless you have symptoms of overheating or missing, especially after you replace the above items.
