3 codes # 5 mis fire , random misfire , fuel rail system pressure to low.

Consult your local Infiniti dealership regarding recalls, have your VIN present when contacting their service department. They can speak to you directly about recalls you may have open on your vehicle. The codes you have definitely lead to some areas to be tested.

The vehicle will need to be properly diagnosed to determine the cause of the misfires and fuel pressure issues. You might want to verify the dealer if the recall has been performed...even the recalls note diagnosis required.