Question about 2003 Nissan Sentra
My check engine light comes on and will not go off.
You need to scan for trouble codes. Autozone and other parts stores will hook up a code scanner for free, and tell you the code numbers. Then you or a tech will start the diagnosis from there.
When the light comes on with the engine running, the engine computer has detected a fault in the engine management which it controls. It turns the light on to let you know there is a fault, and an associated trouble code, or at least a pending trouble code, has been stored in memory. All you have to do is plug in a code reader or scanner into the diagnostic port under the dash, turn the key to on, not start, and the codes will be displayed.
The diagnostic port is a federally required universal connector. All cars and trucks sold in the U.S. after 1996 models have the exact same connector, for communicating with the vehicle's main computer. The system is called OBD-II, for On Board Diagnostics, second generation, and is an example of good government regulations for the cleanest burning engines possible...less air pollution.
Posted on Apr 30, 2015
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Posted on Jan 02, 2017
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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.
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.
the link below: -------
CHECK ENGINE LIGHT
Check Engine Light Reset Procedure?
These will help.
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