Sync 4 inch to sync 3 conversion

“I recently upgraded my 2017 Ford Expedition’s sync 4 inch system to Sync 3 with navigation. Everything seems to be working fine, except for the microphone. When I make calls, the person on the other end can’t hear me, but I can hear them. Also, I can hear music through Bluetooth, also the volume icon doesn’t appear on the screen. However, I am able to adjust the volume using the steering wheel controls and the manual knob. Do you have any suggestions on how to fix these issues?” ps i used a f150 harness

SYNC Region: NA

Navigation Variant: Nav

Manufacturer Year: Pre MY20

Install Type: Retrofit

Old SYNC Version: 0.0

New SYNC Version: 3.4.23188

Do you have a error message, if so what is it?
no errors

Update Method: CyanLabs Manual Method

First try a master reset if not already done.

did not worked

This is a common issue with the pre-2018 Expeditions, well documented on the Expedition and Superduty websites. There is a TSB on this but I don’t remember what it was.

Try this:
Sync not hearing me - Ford Truck Enthusiasts Forums (

1 Like

let me try that thank you

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