Question

1998 Subaru Outback 2.5L with engine codes P0304 and P0303, what do the codes mean?

Answer 1

Hi there,

When you have misfire codes on opposing cylinders like this, it usually means the ignition coil is no good.

Answer 2

P0303 SUBARU - Cylinder 3 Misfire Detected
Read more: https://www.autocodes.com/p0303_subaru.html

P0304 SUBARU - Cylinder 4 Misfire Detected
Read more: https://www.autocodes.com/p0304_subaru.html