Just changed the valve cover gasket on my 2009 with 165k miles. I noticed that I could press the timing chain down slightly between the intake and exhaust sprockets (I know that's not the best description - I should have taken better pictures or measurements before reassembly). A friend got me a bit concerned that the timing chain was worn and needed to be replaced very soon. It seems this usually doesn't occur on these cars until well north of 200k miles unless there were oil issues. I've changed the oil every 5k since new and used synthetic only since ~50k. No codes or real issues. The engine is not abnormally noisy that I can hear. Seems this usually throws a P0016 when the chain stretches/skips a tooth (I assume when the tensioner is at the end of travel). Not sure how long you have after that to get it fixed though... I don't see an easy way to check the tensioner or chain wear without excessive teardown, at which point you might as well replace it anyway. Anything else I should check/watch for, or should I just keep going? Image below, but it's not a great shot of the area in question.