2012 Prius C fob intermittent fob issue

Apologies if this has been covered elsewhere, I did not see the problem I am experiencing. For the last few months, my Prius C will not consistently unlock with either of the fobs that came with it, despite both having new batteries. I have tried to determine if there is a common reason as to why the fobs do not work (e.g., cold mornings), but I don't think that is the issue. I read in a different thread that what I am experiencing may be an indicator of failing actuators, but when the fobs *do* work the actuators sound strong. It could be the problem is slowly getting worse -- seems as if there are longer periods of time when I cannot unlock the car -- but not sure. Any help or clues appreciated, thank you.

 

Thank you for this information! I will check the RF strength for both fobs. Today, I had t unlock the car the old-fashioned way -- physically using the key in the car door -- because neither fob seemed to do the trick. However, once I unlocked the door and tested the lock mechanism inside, the actuators were functional in locking and unlocking all doors. So, perhaps it is the 12v battery.

 

Well, still searching for a solution. Purchased a new 12v battery, thinking that would definitively solve my problem. It did not. There are still instances where both fobs do nothing to open the car doors. Today, out of frustration, I decided to unlock the door by manually inserting the key again, figuring that the car alarm might sound. It did not. The car started up just fine and I drove around for about 15 minutes. I parked the car and locked it using the fob - no problem there, either. Also was able to unlock the car with the same fob. So, I am back to square one. Perhaps this might still mean the actuators are faulty, but the behavior observed makes me think this is not the core issue.