[boxster6354]

You could always swap the coil pack from one to the affected cylinder 4 unplug your battery for a few minutes and then retry and see if you get the same code, if it is for cylinder 4 then not coil pack, if same code on the cylinder you swapped to then it is a bad coil pack.

Only takes a few minutes to swap out.

I threw the same type code, luckily I had already planned on my maintenance (plugs, tubes, oil and brakes) prior so had all parts on hand and the coil pack was fine, was a bad plug.

Also could always check the snap (wire) connection to the coiled pack to make sure it is fully connected.

Good luck.