Digging up this thread. I was originally going through this engine issue and working with Italian mechanics while residing abroad in Italy for four years. I moved back to the US and just ignored the CEL. I even considered just putting a piece of black tape over it. After living with the CEL on for nine years, I started to have engine hesitation issues. Since I was on the original coils I decided to buy all new ones, all new spark plugs (Changed 50K miles ago), valve cover and intake air plenum gasket sets, aaaaaaand two new OCVs. I paid a shop to replace everything, because I am too busy, read lazy.
The CEL has cleared, hesitation is gone, engine power is back (snappier), and fuel mileage is back up. Let's hope this continues. 2007 CX-9 GT with 198K miles and still chugging away! Been through 3 sets of rotors (Originals were garbage) and 5 sets of tires (Originals were also garbage).
I have never owned a car for this long and I can honestly say, I still love to drive it. Zoom zoom!