I have the 2009 RAM w/ Fobiks
i have the same issue now & then
My FOBIKs were replaced & it helped for a while
FOBIK stands for Frequency Operated Button Integrated Key
Now if it does Not unlock the doors, i click the Lock or Start button & then the Unlock button, works more often than not
Most RKEs operate at a frequency of 315 MHz for North America-made cars
Some RF interference can be from machine shops, automatic doors at stores, some home computers, lawn lighting, electric water fountains & sprinkler system
there are many people having this same issue, it was posted on this forum, check out the TSB 08-010-10
that is mentioned
Radio Interference. The 315 MHz band is less crowded than the unrestricted
ISM bands. 2.4 GHz systems have to share air waves and do
battle with high-powered signals originated from pervasive devices such
as Wi-Fi routers, mobile phones, VoIP phones, microwave ovens and
Bluetooth units. When high and low power transmissions share the same
frequency, higher power outputs always win. EnOcean-enabled sensor
networks are isolated from the crowded ISM air waves.
Solid Material Interference. Laws of physics dictate that low frequencies
penetrate through solid materials better than do high frequencies. A 315
MHz radio signal can penetrate more walls, ceilings and furniture than a
2.4 GHz signal.
FCC Friendly Limited Power Output. FCC regulations limit both duty cycle and transmit
power output on the 315 MHz band. The stipulation causes fewer transmissions
and subsequently less potential for interference (collisions).
Short RF Packets. FCC stipulations require that short RF packets be sent
on the 315 MHz air waves. This is ideal for sensor networks and allows for
higher node counts.
Data Streaming. The 315 MHz band does not allow the transmission of
continuous data without gaps. Less data in the air means less potential