Code P0304

DRADZANOWSKI

MEMBER
2009 HYUNDAI SONATA
2.4L
4 CYL
2WD
AUTOMATIC
100,000 MILES

When you're looking at the car, what is the cylinder order (not firing order)? I've looked online for awhile, and Autozone help guides don't have a graphic posted.

C C C C
? ? ? ?
Front of car

Me-looking for cylinder 4

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

The front of the engine that has the drive belt, look there.

The cylinder closest to that is one, then 2 then 3 and finally 4.

I would start with a compression test to be sure there is nothing wrong inside the motor. Then check your plugs to see if there is any fuel or oil on them.

https://www.2carpros.com/articles/how-to-test-engine-compression

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

https://www.2carpros.com/articles/how-to-change-spark-plugs

I attached a picture for you below.

Roy

Image (Click to make bigger)