Could be one or several reasons out of many that caused the check engine light to illuminate. Ask your local auto parts store to plug in a code reader and give you the code(s) then post your findings. Most auto parts store will provide this service at no cost.By the way, the year, make, model and engine info would help.
At least one of possibly a hundred + things. You need to get codes pulled to narrow it down.
You may need to change the indicator bulb, that's what was wrong with mine.
A malfunction indicator light comes on because a detector elsewhere in the item has noticed a malfunction in whatever it is monitoring.
If your check engine light comes on and STAYS ON, a malfunction has occurred that is effecting the emission control system If the light comes on and then goes off , occasionally , the malfunction has corrected itself If the light flashes on and off at 1 second intervals , a spark plug misfire has been detected
The Computer has detected a malfunction - The cheapest way to diagnose what is wrong take it to your nearest Auto zone and have them check the code for you. Most do it for free
I thought the same thing on the wifes car. I forgot about the third brake light, and was looking only at the tail lights.
Run a diagnostic test to find out why the computer turned on the MIL (malfunction indicator light), repair whatever is wrong and the light should go off.
No. A malfunction generally means when something goes wrong
The abs light stays on when the computer has detected a malfunction and set a trouble code.
something that was gone worng then did gone wrong
The check engine light is an indicator that the computer has detected a fault in one or more of the electronic components. Use a code scanner to figure out what is wrong.
There could be many problems with your car depending on the code. For instance, you have to go to a mechanic or car shop for them to hook this plug up to your car. It will give you a code and that code will tell you exactly what is wrong with your car. The MIL came up on my car before and I had to change the thermostat of my car. Once you have the code, you can just google it and it should tell you the problem as all the codes are generic. Hope this helps.
When you first turn on the ignition the indicator lights should briefly illuminate to demonstrate that they are working. If the light stays on after the test cycle, it is an indication that something is wrong.