P0304 and P1316 Codes - 986 Forum - The Community for Porsche Boxster & Cayman Owners

John99Boxster · 11-13-2011, 06:05 AM

I got the P0304 - Misfire on cyl. no. 4.
I replaced the spark plug, the spark plug tube and the spark plug connector....Hope that does it. Otherwise it has to be the coil.

P1316????? Can anyone interpret this one for me.

Also....if I fixed the misfire and the P1316 is not a big issue....can I disconnnect the battery to clear the light....now that I have the codes?

Mrmaddbrad · 11-13-2011, 07:02 AM

You could always call a local shop. They probably have a scan tool that will pull out all codes, even ones that won't set a check engine light, and will be able to reset them all for you.

John99Boxster · 11-13-2011, 07:37 AM

I figured out the P1316....Basically same as the P0304 -P1316 Misfire, Cylinder 4, Emission Relevant.

And the official P0304.....P0304 Misfire, Cylinder 4, Damaging to Catalytic Converter

Fixed.....Unhooked Battery.....CEL gone