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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 do you turn off the service light on a 96 Volvo 850 Sedan?
There are a few ways you can go about doing this:
1. a Volvo dealer2. a mechanic who works on volvos3. you own the service light reset tool.
you can buy the service light tool at www.ipd.com it will cost about $180.
direct link to tool:http://www.ipdusa.com/ProductsCat.aspx?CategoryID=519&NodeID=4564&RootID=629
How do you check code on astro 2004?
You have to hook up an OBD scanner to it. Most auto parts chains have one available, and can run a code diagnostic for free.
Why is the engine light blinking on the infiniti I30?
Usual cause is a misfire.
See related questions below.
Not sure what you mean cng, but if you are talking about your check engine light on your car it means, you need to go to a car repair shop(the type you have if possible) and they'll put it on a computer that tells what is wrong. Can be a lot of things!!First you can see if you have enough oil in your car, and check all the fluids. But after that it could be a lot of things, from a missing fuse(under $1 to fix up to worst case , a cracked engine- which might not be worth fixing)
If you have an oxygen sensor in your vehicle running on cng can trigger that which causes your check engine light to come on.
Check the speed sensor on the top of the tranny. This will tend to build up with metal shavings and cause the sensor not to read the speed of the transmission.
What would cause the engine oil to mix with the fuel?
There are many probable causes. You could have a bad (or broken) piston ring which would allow raw fuel to exit the affected cylinders during the compression stroke. You could also have a faulty EGR or PCV valve. You'll have to take the vehicle into a friendly local dealer so they can "scope" the engine.
How do you fix a code 44 on a 1994 Astro van with the Vortec engine?
Code 44 indicates a lean mixture at the oxygen sensor and it could be a variety of things from a vacuum leak, a bad fuel regulator, or a bad fuel pump. Also those engines were known for bad distributor shafts. It is best to take it to a mechanic.
often the "check engine" light will come on with no apparent problems in any car. there is an array of sensors, actuators, valves, and wiring that is monitored by a computer in the car. if the computer "sees" something that doesnt match a predetermined parameter, it will turn the light on. for example, if your gas cap was left loose, after certain driving conditions are met, the computer notices that there isn't any pressure in the gas tank. federal laws say at this point, there should be pressure there. so the computer turns the light on. there would be no problems with the engine itself, just the emission system, but it turns the "check engine" light on to warn you that your car car is no longer meeting federal standards for emissions.
Sometimes there is a false warning light.
To Check:Turn off all accessories and have the key out of the ignition. Disconnect the negative battery connection for about 30 seconds and then reconnect. This action resets the computer and may make the light go out if it was a false alarm. If the light comes back on, then it is possible that you have an actual problem.
I am not a mechanic, but own a 1999 Sebring. The "Check Engine" comes on for a myriad of reasons. The only way to find the fault is to read the code. This can be done using an engine code scanner, either do-it-yourself or taking the vehicle in to the shop. A third method involves turning the ignition key in a specific sequence which causes the light to flash the numeric code - kind of like a crude Morse code. For a 1999 Sebring, a common code is the "multiple cylinder misfire." This just says that one or more spark plug(s) failed to fire. If this occurs when changing speeds (entering or exiting a highway, for example) then the EGR valve may be the culprit. I've read that it goes bad on these vehicles. If the vehicle has more than 70k miles, then the fuel filter needs to be replaced, per the maintenance schedule. A clogged fuel filter may also cause piston misfires. Good luck.
FOR FREE YOU CAN TAKE YOUR CAR TO ADVANCED AUTO AND THEY WILL READ THE CODES AND TELL YOU WHAT IT IS CALLING FOR FOR FREE. AND ALSO RESET THE SERVICE ENGINE LIGHT IF YOU WANT THEM TO. BUT THEM YOU WOULD KNOW WHAT THE CAR IS TRYING TO TELL YOU. ALSO YOU CAN TRY TURNING THE CAR TO THE ON AND THEN OFF AND THEN ON ( WITHOUT STARTING THE ENGINE) AND IT WILL FLASH CODES ( BY HOW MANY TIMES THE SERVICE LIGHT FLASHS), JUST JOT DOWN THE NUMBER. IT WILL FLASH ONE OR TWO TIMES AND THEN START FLASHING BETWEEN ONE TO SIX TIMES. COUNT THE FLASH'S IN A ROW AND WRITE IT DOWN AND THAN WAIT AND SEE IF IT FLASH'S AGAIN AND WRITE THAT NUMBER DOWN, IT COULD TAKE A WHILE TO GET THIS DONE. BUT WITH INFORMATION IN HAND YOU CAN EITHER GOOGLE AND FIND YOUR ANSWERS OR GO TO ADVANCED AUTO OR A CAR PARTS STORE AND THEY SHOULD BE ABLE TO TELL YOU WHAT IS GOING WRONG WITH YOUR CAR.
Will the check engine light come on when the water pump is bad on 2004 grand prix?
Not until the coolant temperature rises to a very high level or even boils over. When the water pump goes bad it usually (but not always!) starts making squeeling or rumbling noises. Next they will start leaking and THAT is what causes engine damage when the coolant drains out. If the old pump isn't leaking, making noise, or wobbling there is nothing wrong with it.
The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to a parts store or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.
What does the check engine light look like on a 2004 Nissan Quest?
Its not a symbol. It will say "Service Engine Soon."
Problem with the transmission.
You need to have the transmission computer checked for codes to know a possible cause.
Check Engine lights ALWAYS mean that the computer has detected a problem and you should use a code scanner to read the stored codes and figure out what's wrong.
Yes. Go to auto zone and have the codes read for free. And change the fuel filter.
Best bet would go to autozone and pick up a $20 code scanner or have them run your codes, mine was doing something similar and turned out being a bad throttle position sensor
Answerdoes it seem the the engine is shifting too much...maybe the shock absorption is shot in the rubber of the motor mountsI had this happen to my 94 explorer and my problem was that I was low on power-steering fluid, seems like a strange reaction to being low on fluid but, it fixed the surging forward when I was stopped.
egr vavle is very easy after a few replacements. its located under the throttle body with either 2 10mm or 12mm bolts. along with 1 plug. a little tricky at first, but do not take to a dealership for this, waste of time, and ive done about 30+ of these at my dealership. get the erg and the gasket. very easy, remove air filter box, undo all plugs, then replace egr. gl i was told to see if the line was disconted on mine if it was i d to repair it and it ws need to get fitting to conected 2 hoses together. if not then the erg vaulve box wasnt working. its a little black box on the fire wasl by the winshild .check the hose that is conected to it You have to know what the code reads. If it reads PO300, then most probably it is your egr valve. You either have to have it cleaned or replace it. I have that same problem with my Mazda Protege 2001 es and i will go this week to have it checked. Let's see how this will cost. I hope this will resolve my miss fire problem on the car. Alain If you look around at forums and discussion groups about this vehicle, the EGR often comes up. It seems that the check engine light and obd code come up when the egr valve sticks, which happens when it gets gummed up and/or dirty. I have often reset my check engine light by disconnecting and reconnecting the battery, and the light does not come on for weeks, sometimes months, and now it doesn't come on at all. If you take it to a dealership or mechanic out for bucks, they will tell you that you need a new EGR valve, charge you a few hundred bucks, and the thing will get gummed up again in no time. I would either take it apart and clean it out with some pressurized air and carb cleaner, or try reseting the code to see if it's really a constant problem. 60,000 miles after the first EGR related check engine light and I still haven't had any problems.
I would disconect the negative battery cable for about 10 minutes to reset the computer. If the light comes back on then you need to get the codes read.
AnswerPull 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.The " check engine light" is by far one of the most misunderstood technological advances by the public. I am sure I will revise this as time goes on, as it is an in-depth understanding for the public. It is a warning light that is illuminated when there is a problem with 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� that are set based on a pre-set mileage.
Answeri tried all the above and still no solution, i took mine to a dodge dealer and they found a corrodied wire going to the sensor which contributed to the problem ,after it was repaired , Avery thing was fineThe check engine light means that the computer has a problem code that you need to read. Use a diagnostic code reader for your vehicle. Your Chevrolet should be OBD2 compliant, meaning that you need an OBD2 code scanner.
No. To erase codes form an OBD-1 vehicle (made before 1996), the engine does not need to be running.
On a side note, NEVER disconnect the battery while the engine is running; it will damage the computer.
I would make sure power is getting to the fuel injector use a noid light to test it. You may also want to check the fuel pressure also the intake manifold may have a leak that can cause a misfire as well. Glad your compression is good. That is a sure sign its something simple.
Why is your check engine light on in your 98 Chrysler Cirrus?
THE CHECK ENGINE LIGHT IS ON FOR MANY REASONS, THE BEST THING THAT YOU CAN DO IS GO TO A PERCISION TUNE IN YOUR AREA TO HAVE THE PROBLEM FIXED.THERE ARE ABOUT 5 DIFFERENT THINGS IT COULD BE, POSSIBLY THE OXIGEN SENSOR IS BAD.THAT IS USUALY THE PROBLEM.
