Ok I have a 2008 G37S Coupe and for some odd reason my cars been giving me a issue with my key fob. The issue is the key fob stops working and the car will not lock or unlock and I would need to use the physical key in the key fob to unlock the car and I would need to put the key in the dock to start the car. Another Issue I'm having is if the car is start and if I walk out the car and come back in it tells me no key. What could be the problem?? I know the battery on the key fob is like full because when ever I start the car it shows me the fey fob is fully charged.

 

Even though the car doesn't indicate the battery is low, it still could have a low charge. I had the same exact problem with mine and it all went away when I changed the battery.

 

These FOB are super sensitive to metal. Coins in your pocket, even other keys can throw it off. Happened with my Altima, maxima, and now with the G.

There's also a known problem with the front fob sensors getting interfered with.

I get the same problems sometime...other times its fine.

 

This does sound like a battery issue. Could there be any issue with the antenna on the inside of the fob? Have you dropped it a couple times?

 

Thanks for the replies. I'm gonna replace the battery but how do you open the key fob and what battery does it take?

 

I have dropped it a few times and usually the key is the only thing in my pocket so there no metal interference. But that being said the issue started out of no where and it happens randomly and not all the time.

 

i have to replace mine soon too, had similar problems

 

This is quite surprising ... I have never seen my info screen in the cluster show a "Full" battery on startup!?!? It only starts showing up when its nearing its end of life
I am pretty sure its showing you that the battery is empty and not full. An easy way to tell is, if the battery (in display) is not filled with per se, orange colour, your battery needs a replacement. I can almost guarantee that you are mis-reading it.

 

Okay I uploaded couple of pictures showing my battery level and the no key issue even tough the key is in the car. Thanks for the replies people.

 

Have you changed the battery's yet? That first pic is basically the last level for battery life ... Highly possible its "almost" dead. Pretty much confirms as to why it would miss detecting a key inside the car at times.
Didn't you say you are seeing a full battery sign in your display?

 

I meant to say the battery icon on the cluster showed 75% full but I just changed the battery and I'll give you guys the update.

 

Or it could be 25% full?

 

keep us updated after the changing the battery, Id like to know if it fixes the problem

 

Okay after changing the battery I noticed the cluster doesn't show me the battery level anymore and so far I haven't been having any issues but if anything changes I'll let you guys know. Thanks