Diagnostic Aids

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Listed below are some common Android Auto Error Messages or Error Codes -
NOTE:
For vehicles equipped with radio RPO IOR, error messages will not be displayed on the vehicle or device screen.
- Google Play Services error: Android Auto could not connect with Google Play Services
  Likely cause: Something went wrong while setting up Android Auto.
  
  Suggested solutions:
  - Connect your phone to your vehicle with a USB cable first, before attempting to open the Android Auto app on your phone.
  - After you have connected your phone to the vehicle open Android Auto and follow the getting started flow and accept all permissions.
  - If it still does not work, uninstall Google Play Services update and re-update then follow the steps above.
- Communication error 6: If phone battery below 20% Android Auto will not work.
  Likely cause: Radio software or Google Play version out of date.
  
  Suggested solutions: Update to Google Play version 12.6.85 or beyond and check for any radio updates.
- Communication error code 7: Android Auto failed to set up a secured communication with the head unit.
  Suggested solution: Make sure Google Play services is up to date and try a different recommended USB cable.
- Communication error 8: Authentication failed between the car and the phone.
  Likely cause: This is most likely caused by the incorrect date on the radio.
  
  Suggested solutions: Disconnect your phone from the vehicle. In radio settings set the correct date. Make sure it matches the settings on your phone.
- Communication error 12: Vehicle is not responding
  Likely cause: Transient software failure. If this occurs frequently it could be caused by a faulty USB cable.
  
  Suggested solution: Try a new USB cable approved by the manufacture.
- For additional information refer to "Android Auto Help" site.
Visit for a list of Android Auto compatible apps. This does not guarantee the functionality of the app.
Android Auto will only automatically launch the first time it is time it is connected to the system within a key cycle.
If not equipped with wireless phone projection it is required the device be connected to the vehicles USB port. It is recommended to use the device's factory provided USB cable. Aftermarket or third - party cables may not work.
The device Location needs to be set to On for Wireless Phone Projection to work. Ensure the customers device Location is ON by going to Settings > Biometrics and Security > Location.
Before beginning diagnostics, if available verify Android Auto works from the customers device on a like vehicle, meaning: Same year, same model, same radio RPO and same radio software level.
Applications use the mobile device and connection to a service provider to operate. Connection quality issues, or service provider data transmission issues can give the appearance of a vehicle malfunction.
NOTE:
Verify if the customer is using their cellular data plan or the vehicle's OnStar data plan.
Determine if the issue occurs in the same location or if it occurs in multiple locations.
Devices may lose wireless phone projection connectivity from the vehicle due to interference from external WiFi signals.
It is required for the device to be connected to the vehicle via Bluetooth and WiFi in order for wireless phone projection to operate.