Hi there:
When the light comes on, one or more diagnostic trouble codes (DTC) are stored in the engine control module. These DTCs remain even if the light goes out. To address a Check Engine Light problem, the DTCs are retrieved and the appropriate troubleshooting information is followed in order to determine the problem.
* The Check Engine Light turns on and off or flickers.
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.
* The Check Engine Light illuminates, stays on, and there are performance problems.
This means that a vital component of your emission control and engine management system has a serious problem. It usually involves a component or system needed for the vehicle to run at all. In most cases, drive the vehicle as little as possible. In many cases, the vehicle is not safe to drive at all -it could stop or stall out at any moment. It is best to pull over to a safe place and have the vehicle towed to an automotive diagnostician for a thorough inspection and repair.
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
Check
engine light comes on and off, these are indication that there is some
error code stored in your vehicles ECM. The engine module computer
needs to be scanned. These will give the code and as per the error code the
further problem can be detected and confirmed. The engine light
indicator blinks or remains steady on dash when engine computer
noticed any problem with any engine electrically operated components.
For
more help, I suggest you to refer the help links provided below. These will let
you know more about which areas to look, check, when there is engine light
coming up on dash panel.
---------
Click
the link below: -------
CHECK ENGINE LIGHT
http://alltypesofpartsreplacing.blogspot.com/2012/12/check-engine-lightengine-warning-light.html
---------------
Check Engine Light Reset Procedure?
http://whoisbyme.blogspot.in/2012/06/check-engine-light-reset-procedure.html
----------
These will help.
Thanks.
Check
engine light comes on and off, these are indication that there is some
error code stored in your vehicles ECM. The engine module computer
needs to be scanned. These will give the code and as per the error code the
further problem can be detected and confirmed. The engine light
indicator blinks or remains steady on dash when engine computer
noticed any problem with any engine electrically operated components.
For
more help, I suggest you to refer the help links provided below. These will let
you know more about which areas to look, check, when there is engine light
coming up on dash panel.
---------
Click
the link below: -------
http://whoisbyme.blogspot.in/2012/06/malfunction-indicator-light-on.html
---------
http://howtobyme.blogspot.in/2012/02/check-power-train-message-with-orange.html
-----------
http://whatisbyme.blogspot.in/2012/05/2007-toyota-highlander-hybrid-yellow.html
-----------
------------
http://whatisbyme.blogspot.in/2012/05/car-runs-fine-but-check-engine-light-is.html
----------
http://howtobyme.blogspot.in/2012/01/check-engine-light-with-codes-p2195-and.html
----------
http://schematicsdiagram.blogspot.com/2011/12/how-to-read-codes-from-check-engine.html
----------
http://schematicsdiagram.blogspot.com/2011/12/vehicle-smog-test-failed-due-to-no.html
http://schematicsdiagram.blogspot.in/2012/02/obd-code-is-cleared-but-check-engine.html
-------------
http://schematicsdiagram.blogspot.com/2011/12/car-jerks-while-going-uphill-and-check.html
-----------------
http://schematicsdiagram.blogspot.in/2012/02/toyota-camry-check-engine-light-flashes.html
-------
These
details will help.
Thanks.
http://schematicsdiagram.blogspot.com/2011/12/car-jerks-while-going-uphill-and-check.html
------------
Toyota Camry Check engine light flashes while
driving?
http://schematicsdiagram.blogspot.in/2012/02/toyota-camry-check-engine-light-flashes.html
----------1999 Toyota Tacoma: Check Engine Light
Read Code P0171?
http://whatisbyme.blogspot.in/2012/05/1999-toyota-tacoma-check-engine-light.html
--------
2007 Toyota Highlander Hybrid: Yellow Check
Engine Light ON dash?
http://whatisbyme.blogspot.in/2012/05/2007-toyota-highlander-hybrid-yellow.html
--------Check engine light with codes P2195 and
P2197?
http://howtobyme.blogspot.in/2012/01/check-engine-light-with-codes-p2195-and.html
---------Car Runs Fine But Check Engine light is ON?
http://whatisbyme.blogspot.in/2012/05/car-runs-fine-but-check-engine-light-is.html
----------After replacing throttle body the Check engine light starts
blinking?
http://technoanswers.blogspot.com/2012/01/after-replacing-throttle-body-check.html
---------OBD Code is cleared but check engine light
will not RESET?
http://schematicsdiagram.blogspot.in/2012/02/obd-code-is-cleared-but-check-engine.html
--------These will help.Thanks.
http://schematicsdiagram.blogspot.com/2011/12/after-getting-car-washedcheck-engine.html
---------
After replacing throttle body the Check engine
light starts blinking?
http://technoanswers.blogspot.com/2012/01/after-replacing-throttle-body-check.html
---------
This details will help you.Thanks.
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