No Audio on Maps while charging iPhone in the car.

Hi wdurnin,

It's very likely your car is choosing to use the wired connection for audio and bypassing the Bluetooth connection when plugged in. It explains why you can hear audio just fine when only connected to via Bluetooth.

Depending on the model car you have, check for an AUX or "Mode" option to swap between Bluetooth, Radio, and the auxiliary cable. You can test and confirm the audio from Maps in each state.

How to connect your iPhone, iPad, or iPod touch to your car

In the article here you can see you'll choose between connecting your iPhone via Bluetooth or using USB playback.

The user "Chattanoogan" also has a helpful work around you might be able to use found here: Maps are silent on charge in my car - Apple Community

Best!

Thanks for the reply!

To help rule out issues with the connection, go ahead and remove your car stereo connection from Bluetooth settings using these steps:

Go to Settings  > Bluetooth, tap the information button  next to the name of the device, then tap Forget This Device.

If you don’t see the Devices list, make sure Bluetooth is on.

Set up and use Bluetooth accessories on iPhone - Apple Support

Once you've removed this connection on your iPhone, do the same from your car stereo to make sure they are no longer in the settings.

Go ahead and pair with your car once more, just like it was the first time pairing. The steps here can help with that:

On your device, go to Settings > Bluetooth and turn on Bluetooth. Stay on this screen until you complete the steps to pair your accessory. 

Place your accessory in discovery mode and wait for it to appear on your device. If you don't see it or aren't sure how to make it discoverable, check the instructions that came with your accessory or contact the manufacturer.

To pair, tap your accessory name when it appears onscreen. You might need to enter the PIN or passcode. If you aren't sure what your PIN or passcode is, check the documentation for your accessory.

Pair a third-party Bluetooth accessory with your iPhone, iPad, or iPod touch - Apple Support

Test to see if the issues persist, then feel free to post a reply with the updates.

All the best.

Hello wdurnin,

To verify, is your iPhone connected to your vehicle's stereo when this occurs?

If so, does your iPhone connect to your vehicles's stereo through Bluetooth or a cable?

Hopefully those details will help to isolate this further so we can provide the best guidance possible.

Take care.