Took my car in bacause the engine light came on, these are codes they gave me from the readout...
16684 P0300 035
16688 P0304 035
16686 P0302 035

TIA!

16684 is random cylinder misfire detected which leads to:
16686 is cyl 2 misfire detected
16688 is cyl 4 misfire detected

did you try to start your car without the coil packs plugged in? the codes usually stay in the system until cleared.