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
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1999 Boxster
Ocean Blue Metallic/Savannah Beige | Tiptronic | Custom Rear Spoiler | 17" Turbo twist | Red Brembo Calipers | GAHH Top w/Glass Window | Tinted Windows | Cruise Control | Leather Interior | Heated Seats | Color Wheel Caps | Traction Control | Debadged
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