I would almost guarantee it is the chain at those km's.
And possibly also the variatior solenoids, they tend to fail after so many km's too.
The chain isn't a basic job, so I would recommend you trust the job to a qualified mechanic.
I've replaced many timing chains on the 2.2's, and I recommend replacing the balance chain tensioner at the same time. Also replacing the gasket for the engine front cover plate as the oil pump is built into the timing cover and it is important for a good seal for oil pressure to be correct.
For now, I still suggest do nothing for the meantime and just drive it normally and wait for the codes to come back, then we can work out which direction to go from there.