P0303 Jeep - liberty 4x4 sport

Question

engine light comes on and off - is always yellow would a bad muffler cause this to happen? should I replace the one that it said is the problem or all of them when I have the muffler done.

Answer 1

Hi there,

This is not a muffler issue. I would change the #3 ignition coil to try to resolve the issue. You could swap #3 with the one next to it and see if the misfire moves with it as well.