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Service engine soon light comes on for no apparent reason

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Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_check. These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Jan 01, 2011

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Posted on Jan 02, 2017

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1 Answer

Service engine soon light comes on for no reason


next time light comes on go to auto parts store and they can check it with their scanner and tell u the problem for free

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Daewoo Lanos check engine light stays on but no codes coming up. Is there a way to reset?


I suggest scanned the computer in order to know fault codes stored there, soud like a EVAp or Emissions failing.

If the Check Engine Light comes on in the city but goes off on the freeway, then the fault is present during city driving conditions. Pay attention to whether or not the vehicle runs or drives any differently when the Check Engine Light illuminates. If vehicle performance does change, drive the car as little as possible and take it to be checked by a service professional as soon as possible. If there is no change in vehicle performance, you can drive home, but have it inspected as soon as possible. In this condition, you run a risk of the vehicle dying or not starting.

* The Check Engine Light comes on and stays on.
If the Check Engine Light illuminates constantly during driving with no noticeable driving or performance problems, there is a permanent fault in the emission control system. When this happens, the computer that controls the emission system usually has a backup program that runs while the fault is present. (These backup programs are often referred to as "limp home" mode programs.) You should get the vehicle serviced as soon as possible, but in most cases, the vehicle will continue to operate, though you run a risk of it dying or not starting.



Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day

Jun 27, 2012 | 2000 Daewoo Lanos

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Lincoln town car + service engine soon


Service engine soon has nothing to do with service or maintenance . Emission's OBD 2 engine managment system . Light on ! DTC'S - diagnostic trouble codes stored . Your don't know THAT ! Your best bet , take it to the dealer .

Aug 30, 2017 | 1998 Lincoln Town Car

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Service engine soon light is on


The service engine light will come on for a variety of reasons, and to say what caused it is just a wild guess over the internet. It could be as simple as the gas cap was loose. You need to have the code(s) retrieved to determine the reason. In some states your local Auto parts store will do that for you and some are free.

Jun 24, 2011 | 1998 Nissan Maxima

1 Answer

My 2000 Jaguar S type engine light remains on for no apparent reason. Is this serious?


The 'check engine' or 'service engine soon' light comes on when the computer detects a problem with one of the emission control systems. The problem may be minor, but could also cause bigger problems down the road. Usually part stores can tell you what the check engine light means for free.

Nov 27, 2010 | 2000 Jaguar S-Type

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When I start my 2001 alero the anti-lock, traction light, service engine soon, service vehicle soon lights all stay on all the time. But my car seems to be running fine. Why is this?


the anti-lock and traction lights will come on together if there is a common problem with the two, since they are closely related. may be a wheel speed sensor or something similar. the service engine soon light indicates a problem with the engine computer, can be anything from an emission system problem or an engine performance problem. all of these lights can come on with no apparent running problems on the car. the service vehicle soon light is basically a maintenance reminder, an oil change light. take the car into a shop and have the codes read for these lights.

Feb 23, 2010 | 2001 Oldsmobile Alero

1 Answer

My Ford Explore 2003 has engine service soon light on. What shall I do with it?


Go to an autozone they can read the codes and reset the light. They do this as a free service. If there is a problem and you dont repair it the light will return. Sometimes the light can come on for no apparent reason (no code present) a loose gas cap can trigger the check engine light.

Nov 15, 2009 | 2002 Ford Explorer

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2004 pontiac grand am service engine soon light


I have the same car and if the gas cap is loos for any reason the service engine light will come on so check that. If it is it will turn off in a few days after you tighten it.

Mar 31, 2009 | 2004 Pontiac Grand Am

1 Answer

Service engine soon light comes on and goes off


The service engine soon light comes on for many reasons..it could be as simple as CO2 sensor, or it may just be one of the lights that just stays on, ask your local GM garagre to reset the code for you..maybe cost you a couple bucks.

Dec 18, 2008 | 1988 Oldsmobile Delta 88

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