INPA 209 EWS-Code Error

[DTM_Theory]

Previously I was attempting to replace a SAP because it was going out. Upon replacing it my engine would crank but no spark to start the engine.

Running INPA on the EWS and DME gave me two codes;

From EWS: Error 15 - Power-On-Reset
From the Engine: Error 209

Previously I wasn't getting Error 209, but because of Error 15 on the EWS research suggested it could be an issue with rolling codes between the EWS/DME not matching; thus the the crank/no start issue. I tried to resync them using INPA, then it gave me the Error 209 code when running INPA again. I tried to reset it as well (using option F2) and I still now get no crank/no start. Today I took my battery to an auto parts store and had them check it. It was running at 11.6v and they recharged it. So the battery seems to be good now regarding the EWS.

Leaving the key in the ignition, putting it in position 1, and opening the door gives me a ring with an error in OBC saying "key in ignition" So that would rule out the issue being the key transponder, keyring, and ignition switch right? I'm sort of confused. Should I try replacing the key itself? Any ideas? I'm at the loss at the moment.