Question about Bluetooth in Cars?

I started a new job this week and the first day I was perfectly able to connect my iPhone to the vans Bluetooth and play my music. The second day I was connected again but I couldn't hear the music playing. I think it might have been on Aux mode and I didn't know. Either way since I thought it wasn't working I disconnected my phone from the Bluetooth in hopes to reconnect it and solve the problem, but now I can't reconnect. There's nothing wrong with my phone I've made sure the Bluetooth still works with my speaker at home but I just can't connect to the van anymore. It doesn't even show up as an option to try and connect once I turn the Bluetooth on and try to pair it with the van. Is there anyway to like restart the vans Bluetooth so it lets me connect to my phone? Honestly I just need something

That's too vague to properly answer.

Without any helpful details, I'll have to give a generic answer:
Go into the infotainment's settings and look for something like "Pairing history" or similar. In that section, there's almost always a "forget all" or "erase" function that will wipe out the list of devices that have been paired to that system. Do the same on your phone and try the pairing process again.

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