Nexus 6 does not work with AUX in car? Plays through phone speakers?

Hi!

I just got a 2010 Ford Fusion and I noted that the car has an aux function. I got an Aux cord that I had laying around for ever and I decided to give it a go.

I turned on Spotify, connect the aux cord but I didn't hear music coming out of the car, it was playing through the speakers on the Nexus 6. I connected my MacBook Pro with the same aux cord and I was able to hear my music fine.

I am on Chroma and I have Viper4Android installed, could it be something with v4a? I have headphones enabled in the control panel in V4A.


Thank you very much!