2016 Ram 1500 - Key Fob

[John W37]

It's been a while since I was on the Forum but I am polling the brain trust on this one. I don't have a push button start and have the Fob that requires insertion and turning to start. Both of my Fobs are factory original. I drive the vehicle daily and the Fob I use has been working with no issues. I attempted to use the second Fob and none of the buttons worked. I assumed dead battery. I replace the battery and the same issue existed. I use a VOM and checked voltage on the old and new batteries that show 3.2 & 3.1 volts. I check continuity on the PCB and found no issues. I unlocked the truck with the working key Fob and used the malfunctioning one to try and start the truck. Amazing enough it started. It ran for maybe 30 seconds and I shut it off. When I exited the truck I tried the non-working Fob to lock the truck and it worked. It also unlocked/remoted started after that and works as expected.

Any ideas on what might have caused this?

 

[Atcer2018]

No idea why it did that but I can say it’s not only a Ram issue. My daughters Civic will randomly not recognize a fob yet still allow her to start and drive the car. Key and immobilizer chip work but the fob buttons don’t. I’m curious about why this happens too.

 

[NETim]

Maybe try cleaning the contacts in the fob? It doesn't take much to stop 3v.