Lifter Ticking Noise

The service engine soon could be relatd, or could not. A scan of the trouble code should differentiate. As far as the ticking noise, I have seen a couple of these that have had cam and lifter damage. This can be hard to detect, and the heads have to come off to remove the lifter carriers to inspect. If you can determine which cylinder the noise is loudest at, you may be able to isolate it running with the appropriate valve cover removed.