Had this issue with my 2013 QX56 with 148K miles. Check engine light with codes P0087 and P0090. Took it to a local shop and they found that the high pressure filter had warn a hole in the center and they were able to pull the warn part from the cam housing. They had me stop by the shop to show me the damaged part and from what I could see the cam shaft did have minor scoring. The shop replaced the high pressure filter but did advise me that the cost to replace the cam would be excessive, but would need to be replaced in the near future. In the interim my wife came home today to tell me the check engine light came on today. I'm getting code P0011, which indicates cam shaft issue. Is it likely the high pressure failed this quickly?

Worn part, not warn!

Correction: High Pressure Fuel Pump "LIFTER"! Damn spell check.

Yeah guessing that cam needs to be replaced. Hate to say it but would have traded after the lifter bucket was replaced.

We just got screwed out of about $15k when lifter bucket and timing chain failed at 134k (got $5k from salvage yard) when it would have been close to $20k trade in/sale.