I experienced a similar situation with my 2011 RR HSE resulting in bad fuel injectors. Injector cleaners did not resolve the issue for me. After having the dealer quote me $1300 to repair each one, I had them run the diagnostics to determine which injector(s) were bad. If you are into doing the repair yourself, its not difficult at all with the "CORRECT" injector remover tool. You also need to know the firing order of your cylinders.