1999, 996 manual coupe. I noticed that in the thick wiring loom on the right hand side at the back that a blue wire and orange wire are broken. Rats may have chewed the black covering and chewed the wires.

I don't have a wiring diagram. What do these wires do and where do they go to?

I have the following codes. P0327, P0153, P115 and P1119. Could this cause the codes?

 

Yup,looks like rat or mice damage.

Not sure what wires those are, but it doesn't really matter as they obviously have to be fixed.
Splice in a short piece of some # 16(?) wire with butt connectors, at least for now, and see if your mil turn off... If not try to clear codes and see what comes back...

jmo

 

Thats the main harness from the dme to the engine electronics. Its all important and needs to be repaired.