Hi,
If they both came on at the same time, I suspect it is either a stretched chain issue, a chain tensioner, or a chain jumped time.
There are three timing chains on this engine, a primary, a left secondary, and a right secondary. See pics below.
Here is the odd thing, I question if it is a secondary chain because each bank (or side of the engine) has a related code. So, my first suspect is the primary chain either lost tension or is a tooth off.
On the other hand, is the engine oil clean and full? There could be a hydraulic issue with the variable valve timing, but both sides failing at the same time is odd. Ugh. This won't be an easy one. LOL
I suspect the timing chain cover needs to be removed for inspection of the chains, tensioners, and correct timing.
Let me know your thoughts.
Take care,
Joe
See pics below.
Images (Click to make bigger)
Tuesday, October 24th, 2023 AT 7:17 PM