Just hit $28k miles and my 2012 JKU threw a P0304 code. Does that code mean I have the infamous cylinder left head tick or do I just need to replace the spark plugs / coil?
Wondering if the P2099 or P0304 is more related to the cylinder head needing replacing.
Take the coil and plug out and swap it with the cylinder next to it. Then clear the code and see what comes back. If the P0304 comes back, it's not the coil or plug.
Take the coil and plug out and swap it with the cylinder next to it. Then clear the code and see what comes back. If the P0304 comes back, it's not the coil or plug.
