So I just got on the highway for not even 3 mins...next thing you know, car starts vibrating at around 60 mph. Slowed down a little bit and the vibrating stops. Accelerated to around 60 again and then vibration starts again. The "Check" light is lighted up on the dashboard and then i pull over. So i take the next exit off to go back home and headed straight for the nearest Advanced Auto Parts store and the guy tells me my 1,3,5, and 6 cylinders are misfiring. He wrote down the codes which are P0301, P0303,P0305,P0306, and also P3199. Any sure if these are the right codes? Also, when am i supposed to do to fix this problem?? AND also, cost and labor.

 

I wrote one of the codes wrong. Instead of P3199, its P1399. Sorry

 

sounds like a coil died
- common failure- 50 dollar part
I know it says 4 coils are bad.... but codes are clues- not diagnosis
Buy 1 coil and start with the cylinders they listed- put new coil on 1st suspect- reset ecu by pulling CLOCK fuse on passenger foot area of car- put fuse back in
then start engine- better? NO? remove new coil- put old coil back on- move to next cylinder- install new coil- reset ECU - test- good- your done- not good- keep doing it until you find the one that makes the car run smooth again
Thats it!
Now add 1 can seafoam or redline SI-1 fuel cleaner to 1/2 tank of gas to clean the crud formed normally and during this misfire situation

iirc the back cylindrs are 1-2-3 and the fronts 4-5-6 for numbering purposes