It's a very long list of possibilities. Bad fuel pressure, timing being off, a bad sensor, poor airflow, incorrect temperature readings, just to name a few. Any auto parts store can hook up an OBD2 scanner and pull Data Trouble Codes at no charge to you.
If the check engine light it on a 2002 Hyundai Accent on one of the sensors is malfunctioning. The computer is acknowledging this and alerting the driver that there is a problem in the engine.
I have a 99 Hyundai Sonata That the check engine light came on, and # 3 & 5 Injectors were fouled
No the check engine light will not come on
it has a problem
The check engine light, on your Hyundai Elantra can be reset by removing the fuse. Keep the fuse out for 10 seconds and replace it to its slot.
No, oil level does not cause the check engine light.
Yes, an unplugged sensor can cause a check engine light.
P 0172
you disconnect the battery for a couple minutes.
Yes, water can cause a misfire, which will cause the check engine light to flash.
The check engine light is reset with a scan tool after repairing the cause of the fault.The check engine light is reset with a scan tool after repairing the cause of the fault.
No, low gas cannot cause a Check Engine light to turn on. There would have to be a problem within the engine or the engine wiring for that light to come on.