[Mslatina13]

This is the code that pops up on my code reader... Does anyone know what it could be?
I had all the spark plugs and ignition coils changed last year in March

I have a 2013 Hyundai Elantra

 

[Oleg_S]

It's mean that you have misfire in cylinder number 4. It could happen because of problem with wiring, connectors, bad spark plug, ignition coil, ECU etc. It is just a symptom for many possible problem. You need to investigate it by yourself (if you have some tools and experience) or found good shop/mechanic/friend who will do it for you.

 

[mkjh]

I agree. It's just going to have to be a process of elimination. Did you replace the spark plugs and wires yourself? What brands were used?