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Re: engine service soon light
The service engine soon light, or malfunction indicator lamp, indicates that the car's engine management systems are finding a fault somewhere. The vehicle may be running "fine" but when a MIL indicator is on it tells your car's computer to run on a "drive in default". In other words, it senses something wrong and cannot calculate the correct setings to make the engine run as it should so it sets the fuel to air ratio and many other things to values that it knows will make it run so you can have it serviced.
You fuel economy is likely suffering and running and engine on default settings may cause engine deposits and further damage.
You could take your car to autozone and they will pull the codes for free but they may not clear it for you. There is a procedure on many Caddis that allow you to look athe the fault codes throught the welcome or convience center or through the auto climate controls display. I will research the procedure for this vehicle and post it as info becomes available.
You could also disconnect the battery for a few minutes to clear the codes BUT YOUR SECURITY SYSTEM AND OR STEREO LOCKOUT CODE MAY RENDER SOME SYSTEMS USELESS IF YOU DONOT HAVE THE CORRECT CODE TO REACTIVATE THEM. I do not recommend doing it that way.
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Put the key into the ignition and turn it to "Run." Don't start the engine. Press down slowly and fully on the gas pedal, then release it. Do this three times in five seconds. Watch for the "Service Engine Soon" light to start blinking. This indicates that the system is resetting itself. Turn the ignition to "Off" and wait one minute. Start the Century's engine. The Service Engine Soon light will flash for a moment, then turn off. If it doesn't do this, repeat the process.if all else fails...Disconnect your battery for one minute and then reconnect it again that should reset it, if the problem that you have in your car is still there then that light will come on again after whille then you gona need to run diagnostics on your car to find the problem if it will not come on again then that should take care of it.9-08-2006Let me tell you about my experience with my 1995 Buick Century.When my buick sits for a while while running, the radiator fan comes on, you know?Well, after the fan does its thing, SOMETIMES the "SERVICE ENGINE SOON" light comes on.THEN.....when this happens again, it may take a couple times of after the fan comes on, then....the light goes off !!!Its like it needs to go thru some sort of "CYCLE" , THEN THE LIGHT GOES OFF...Who knows though,you may have LEGITIMATE problems with your car.good luck.
There are really too many things to list that can cause the service engine soon light to come on. I suggest you have your mechanic scan your vehicle to see what codes are present to cause the light to come on.
could be many things, but the first thing I would check is the gas cap, if it is not tight or is not sealing properly the purge system will not work , and that will cause the service engine soon light, but keep in mind the car has over 30 sensors that can turn on the light.
im guessing that the service engine light is comming on and off instead of staying on all of the time. these service lights come on for a long list of things. this is the time of year when we tend to use all of the power option in our cars. light wipers heater ect it is also this time of year that we find out how good our charging system is working and how good our batteries are. control voltage in most vehichles is between 12.5vdc and 14vdc check engine lights can come on when your control voltage falls below this given level. warning lights could be caused by a sticking thermistat. the difference in temperature from hot water in to cooler fluid out of the radiator should be roughly 6 degrees from top to bottom higher or lower ranges may cause this to light up the check engine light. and there are a host of other minor things that will make the light come on and off. washer fluid levels, brake fluid level being low but not fatal. a missfiring plug at a certain rpm due to carbon build up inside the distributor cap. alot of genaral maintinace type things create this onand off scenario.
There are hundreds of things that can cause the service engine light to come on, some so simple as a loose gas cap. The easy thing to do is to stop by your local auto parts store, such as autozone. They will scan your car for free, and tell you what tripped the light. Once you have a better idea what caused it, you can go from there...
Have had the car serviced lately? Oil change, tune up, things of that nature? It may be time to do that stuff. Does that car have a "Service Engine Soon" light and a "Check Engine" light? If the car has been serviced recently and the "Service Engine Soon" light is coming on, it's because who ever serviced it, did not reset the light. To reset the light, this works on most GM cars, turn the ignition to the "on" position DO NOT START THE CAR!!! Now within 5 seconds push the gas pedal to the floor and release it 3 times. That should reset the light if that don't work, you may want see what it says in the owners manual. Or you may have to take it to a shop. If the "Check Engine" light is coming on then there is a problem with the vehicle and there should be a "code" in the computer. Most auto parts stores will put a scanner on your car and read the codes for free. Those lights are there for a reason, if ignore them your car will let you down.