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.
P 0172
you disconnect the battery for a couple minutes.
Cold weather can make your check engine light come on for various reasons. It could be caused by low fluids or a sensor.
No
take it to autozone and they'll tell you fro free
disconnect the battery for about 30 sec then reconnect it
No, the check engine light means there is a problem with the emissions system. The maintenance required light means something like an oil change needs to be done.