2015 S3 that's unmodified. Recently threw a P219E code, which seems to be related to cylinder 3 but is pretty ambiguous as to the actual problem. Cleared the code, no issues for 48 hours, and then it threw another code, this time P219D. This one seems related to cylinder 2, but again, not seeing much online for specific problems.

I chatted briefly with Audi after the P219E code and they said it may be a failed/leaking injector, but I don't have any other codes, no misfires, etc. Car isn't experiencing any misfires that I can detect, no loss of power, fuel consumption seems normal, idle seems normal.

First thought was to replace the spark plugs, maybe ignition coils, and then take apart the manifold - maybe a large carbon build up or damaged injectors. Otherwise, any other thoughts as to what these codes are suggesting?