Replaced the batter inn my key fob, brand new package to fob. I have issues with it displaying 'No Key Detected', and I have to put the fob directly over the ignition button for a few seconds to detect.

 

I have had that happen to me a couple x in my altima and quest. Bad new batteries were the culprit for me. Sometimes they sit in stores and go dead over time. I usually get mine off of AMAZON, and get duds from time to time. Try another new battery

 

Bought a new package and it seems to be working.

 

If this fails repeatedly, it is possible one of the three antennas hidden in the car that are used to determine if the keyfob is inside or outside the car may have failed. But hopefully that will not be the case, as many techs have trouble pinning that problem down, and replacing one of those antennas can require some time.

 

 

Had this prob. a few times with my Altima. Went through 3 new batteries until I hit on a good one. Each battery measured the full 3v too. Go figure. If you are replacing a battery I suggest buying several "brand name" ones.

 

For me and my '13 370Z it is the sensor that detects that the key FOB is near. Unfortunately I never had them fix it so the light is on most of the time. Key FOB works though.

 

I bought 2 remotes for my 2010 max, that came with batteries. The locksmith the programmed them ended up going thru 8 new batteries to find 2 that worked. need to test the batteries first, seems to be a lot of bad batteries out there!

 

 

Cheap batteries from a furniture maker, no wonder they don't last long. Use Energizer or Duracell.

 

 

Swap remotes with your wife. Might isolate the problem to your remote. You might then have a better story to tell the dealer.

 

I have found that it helps for both sides of the battery to have good contact. Skin oil can contaminate/insulate the surfaces without being visible. Try wiping down each side of the battery with denatured alcohol, maybe with a Q-tip. Works well for me. You might even wipe down the mating surface contacts in the FOB itself, just to be sure everything is tidy-whitey! Be careful that your alcohol applicator does not leave traces of itself on sharp contact surfaces because this can insulate too.

 

My 2017 Altima SL has been having a similar issue where both keys would start/unlock the car, etc, but car would randomly display No Key Detected. Thinking maybe it was a battery issue (even though there is a message that I have seen that indicated Low Battery Detected), I replace both batteries in both keys. Still after this, randomly the No Key Detected would display.

Since my car is still under warranty, took it in this past weekend. I know they did some re-programming as the beep horn when locked is now activated; I had previously de-activated that feature.

They indicated that on both keys, the internal key was pressing against the battery compartment prongs and this was causing the battery to get loose enough to where it wasn't making good battery connection. They adjusted the prongs, said there was a little corrosion, cleaned and tested.

It's only been 3 days and the message hasn't come back up, however, I'm not convinced this is was the issue - time will tell.

Just throwing this out there. Was always afraid that I might get stranded somewhere when this occurred but in all cases the car would still start up with this error. I drove 10 miles and about 30 minutes away last week with No Key Detected. So now I am in wait and see mode.

 

 

I'm going on 2 years this coming Dec with my '17 Max and I still have not received low battery warning, and that battery has to be down from 3v. My old Altima would have been messaging me about my run-down FOB battery by now. Of course the Max battery could poop out tomorrow morning.