Invalid Data Received From GPS Navigation Module
The U0440 code means the vehicle's onboard diagnostic system has detected: Invalid Data Received From GPS Navigation Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $200 - $800 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Navigation showing wrong location
- GPS signal frequently lost
- Incorrect routing directions
- Map display not updating position
- Speed shown on GPS incorrect
Probable Causes (Ranked by Likelihood)
- Failed GPS antenna Very High
- GPS module internal failure High
- CAN bus data error Moderate
- Aftermarket window tint blocking signal Low
Step-by-Step Diagnostic Procedure
-
Check GPS antenna connection
-
Test GPS signal strength
-
Scan navigation module for codes
-
Verify no metallic tint blocking signal
Frequently Asked Questions
Can I drive with U0440?
Yes. Use a phone for navigation until the built-in system is repaired.
What causes U0440?
Usually a failed GPS antenna or metallic windshield tint blocking the signal.
Can windshield tint cause GPS issues?
Yes. Metallic tint can block GPS signals. Some tints have a clear area for GPS antennas.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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