I just got a new key fob programmed and all by a locksmith and the keyless entry won't work and didn't work beforehand but I just thought I needed a new key. The door locks can still be open manually with the key and buttons on the inside but won't read the fob and just flashes red. Locksmith said it might be a sensor but not sure? Anyone would know what it is?

 

What year accord do you drive?