Timing is out but deviation is steady: set timing or major overhaul

[JFP in PA]

You are not going to see codes until you get beyond 12 degrees or so. You are also not going to be able to correct this issue by resetting anything; it is a wear issue.

As this is a five chain engine, you most likely problem is the small chain tensioning paddles that sit between the cams (a common problem on the five chain). Without leak down data, the actual condition of the rest of the engine is speculation, but more than likely the engine is fine other wise.