REPROGRAMMED) Only ways to reprogram, are these. If your check engine light is off, Your ECU has reset. You can attach your cable/s back, and turn (Capacitor and resistors still retain power after the battery is disconnected. Your trying to drain all the power the car still has Leave it unplugged either overnight, or Unplug both, and then touch the You can tell this by doing this next part ImĪbout to tell you. Settings, and they need to be programmed.

Your resetting, not programing, The car will So a few things, You can do the reset yourself. Well Matt, you were Incorrect, and should listen to your customers. And he said, 'NO AMOUNT OF REPLACING PARTS WILL FIX IT. But, the Cape Girardeau, MO Mechanic didn't know about it. One would think enough case histories from Nissan would have found this simple problem. Simple fix, and access is easy with the plastic push pins. If the Short Term Fuel Trim is right at ZERO, then the engine is performing correctly, it's just that the Air Flow is out of range. Simple fix that saved me the out of pocket cost to reprogram. I used RTV to add a piece of rubber around the side to seal the Intake. If you remove the Air Scoop Intake, that goes into the square hole for Air Filter Box and look at the 5/16' Foam tape which seals the Intake, you will see one complete side of foam missing. The Nissan folks cure it by reprogramming at a cost to you. Yes, I had the same problem with the OEM MAF Sensor on a 2014 Altima S.

Sl55 mass air flow sensor problems