Well, I'm having a heck of a time getting my nav unit fixed, and thought I would share my experience for anyone else who gets into this situation. My 2016 F150 Lariat was purchased around April 2016 and has 18K miles on it. I have been having problems with the Sync3 GPS and XM radio.

Basically the problems are:

1. The XM radio would cut out frequently with clear view to the sky
2. The GPS stops working with a "GPS" and a red circle and a line through it indicating that the GPS is not working. The vehicle position on the map gets farther off the longer I drive. Using it to navigate is impossible because the longer I drive, the farther off of my actual location the computer thinks I am.
3. The Sync3 screen freezes for 3-10 seconds at a time and pop-up menus sometimes take up to 10 seconds to fully pop up.

The XM radio had the problem from day 1, but the GPS problem and screen freeze-up problems didn't start happening until around December.

Here is the saga so far:

1. I called to make an appointment with the dealer and the dealer told me I should perform a software update the SYNC system, so I upgraded it from the v1.0 that it came with to the v.2.2 version. The problems were exactly the same following the upgrade.
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2. The first time I brought it into the the dealer they said there was a service bulletin on the XM antenna, so they replaced that. I believe they also replaced the GPS antenna.
   
   The XM antenna replacement fixed the XM radio cut-out problems. IF YOU HAVE THIS PROBLEM TELL YOUR DEALER TO LOOK UP SERVICE BULLETIN SSM 46016
   
   On the way home from the dealer, the "No GPS" symbol came back on. The screen continued to freeze up frequently too.
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3. The second time I brought it into the dealer they were able reproduce the problem and get an error code on the NAV unit. A board needed to be replaced and was on back order.
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4. The third time I brought it in they replaced the board in the NAV computer. The work order says "...PERFORMED ONLINE APIM TEST FAILED. GAIN ACCESS TO REPLACE APIM AND REPROGRAMMED. RETESTED AND ROAD TESTED OK ALL WORKING AS DESIGNED."
   
   On my way home from the dealer the "No GPS" symbol came back on. The screen freeze up problem keeps happening again too.
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5. The fourth time and they were again able to reproduce the problem with the "No GPS" and the screen freeze up. They said they found error codes indicating that there was a problem with some of the signals on the computer cables and/or pins. After having my truck for 11 days, they told me it was all fixed. I asked them what they fixed and said they couldn't find any specific things broken so they unplugged all of the computer wires and plugged them back in. They said the drove it around multiple times and the problem did not happen for them.
   
   On my way home the "No GPS" light came back on again just like the past times. The screen freeze up problem still happens too.

The dealer has had my truck in four times now for a total of 19 days. They are stumped and told me to escalate it with Ford customer service, which I did 6 days ago. I haven't heard back from Ford or the dealer yet in regard to the case number that was opened.

If anyone else has experienced this and found a solution, any help would be appreciated. If not, I'll keep posting until I get this resolved to help the next person who has this issue.

 

Have the same issue with my XM radio...

Cuts out A LOT! I have a stand alone XM receiver that I have in my work truck with the little magnetic antenna, works 10x better.

I did notice a couple weekends ago when I was out of the city that the reception never cut out.

It will be interesting to see what others say but I can relate with the crappy reception...

 

well known and documented

https://www.f150forum.com/f118/2016-...ked-up-371665/

 

There is a SSM out to replace the Sirius antenna. Had it done to my 2016 xlt. Fixed the issue completely. Issue is in the city getting interference from cell towers. Hence no issues in the country....
I'm on my phone or I'd like you to the many posts on this, but just do a search. You will find it.

 

How did you update to 2.2?

 

Sounds like a hardware problem to me.

Also, that dealer should not have told you to do a software update because according to the Ford owner website, V1.0 is the most recent and up to date version for you vehicle.

Unless they finally released it this weekend, V2.2 is not yet and official update from Ford for Ford vehicles.....only for Lincoln.

 

My 2014 edge had xm dropping out all the time. Traded it in.

 

I used links to official ford ZIP files from this website, but looks like the links are down now:

http://www.2gfusions.net/showthread....0870#pid100870

 

[QUOTE=GABAR;5194788]Sounds like a hardware problem to me.

I totally agree that it sounds like hardware.


Also, that dealer should not have told you to do a software update because according to the Ford owner website, V1.0 is the most recent and up to date version for you vehicle.

I was surprised too. I even asked them again if I should and verified that it wouldn't affect warranty and they assured me that it was okay to do.

 

For the people replying to the XM radio issue, it was fixed by replacing the antenna...that is not a problem any more.. If you are having problems like I was, take it to the dealer and tell them that there is a service bulletin SSM 46016 for replacing the XM antenna assembly.