Loss of GPS Signal
2004-2008 Ford F-150 4.2L V6
Description
The navigation or telematics module has lost the GPS satellite signal for position data.
Symptoms
- Navigation position lost
- GPS coordinates unavailable
- Map position incorrect or not updating
- Telematics location unknown
Common Causes
- GPS antenna failure
- GPS antenna cable damaged
- Antenna connector loose
- Windshield metallic coating blocking signal
- Module GPS receiver failure
Diagnostic Steps
- Check GPS antenna connection
- Test GPS antenna signal with known good antenna
- Inspect antenna cable routing
- Check for aftermarket window tint blocking GPS
- Test module GPS receiver
Repair Notes
Check GPS antenna and cable connection. Metallic window tint can block GPS signal.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0005High Speed CAN Communication Bus (+) High
U1056 on Other Vehicles
Ford Bronco
2021-2024 2.3L I4 EcoBoost
Ford Bronco
2021-2024 2.7L V6 EcoBoost
Ford Bronco Raptor
2022-2024 3.0L V6 EcoBoost
Ford Bronco Sport
2021-2024 1.5L I3 EcoBoost
Ford Bronco Sport
2021-2024 2.0L I4 EcoBoost
Ford Crown Victoria
1998-2011 4.6L V8 Modular 2V
Ford E-150
1997-2014 4.6L V8 Triton
Ford E-150
1997-2014 5.4L V8 Triton
Common Questions
What does code U1056 mean on a 2004-2008 Ford F-150?
U1056 stands for "Loss of GPS Signal". The navigation or telematics module has lost the GPS satellite signal for position data.
What are the symptoms of U1056 on a Ford F-150?
Common symptoms of U1056 include: Navigation position lost, GPS coordinates unavailable, Map position incorrect or not updating, Telematics location unknown.
What causes U1056 on a 2004-2008 Ford F-150?
Common causes of U1056 include: GPS antenna failure, GPS antenna cable damaged, Antenna connector loose, Windshield metallic coating blocking signal, Module GPS receiver failure.