This is also happening to me on my 2008 Grande. I have had my Oxy sensors cleaned, also my mechanic has also reset the code on several occasions. He told me that the system is registering that I have put in dodgy fuel, I only put in 95 or 98 Octane fuel and only from services stations whom have recently renovated their fuel tanks (all of the 7-11 fuel stations in our area have upgraded their stations). I have had this issue for the last 6 months, and am getting sick of constantly going to the mechanic to "get the problem fixed". Is it recommended that I also replace my Oxy filter? Any advice would be greatly appreciated.
