there could be a thousand different reasons. there is no way to tell or even guess with the iformation you have given.
If not installed properly check engine light will illuminate
How do I get the code
You may think there is nothing wrong but there is. If the check engine light is on there will be codes stored in the ECM. Have the codes read. The codes will help you determine what the cause is.
this is caused by the sensor tripping in the light sensor to see what causes this you must diagnose it with a computer and see what fails in it.
It will be an icon of an engine or it will just say Check Engine.
how i reset check enging light manually at mitsubishi fuso 4m50
Check your head light bulb or check the fuse 10A under the hood and see if it's not blown.
how do i fix the problem if the tcl light comes on in a 2003 mitsubishi galant
wen I stop at a red light my Mitsubishi galant sound like it is try to stop running
To aim the Mitsubishi Galant Headlights open the engine compartment of the vehicle. Locate the headlights and use a screwdriver on the vertical adjustment screw positioned on top of the headlight. This screw will allow adjustment for position where the light will shine.
Check engine light refers to the emission system - have vehicle scanned to determine problem
Remove negative polar of battery and replace after a couple of minutes. FYI your car will ride rough for about a half hour while the computer re learns itself (reset)