What Does U0499 Mean?
The control module has detected invalid or corrupted data from the telematics control module. This affects connected vehicle services, emergency calling, remote vehicle access, navigation, and vehicle tracking features.
Common Causes
30%
Failed telematics control module or internal modem/GPS hardware failure
25%
Cellular or GPS antenna connection issues affecting signal quality and data transmission
20%
Communication network wiring faults between telematics module and other control modules
15%
Inactive or expired telematics service subscription causing authentication errors
10%
Power supply or ground circuit fault at telematics module
Diagnostic Steps
1
Step 1: Verify telematics service subscription is active through customer account or service provider portal
2
Step 2: Test power and ground circuits at telematics control module; verify battery voltage present and proper ground continuity
3
Step 3: Inspect cellular and GPS antenna connections; ensure antennas are properly mounted and cables are undamaged
4
Step 4: Use scan tool to monitor telematics module communication and GPS signal strength; document any intermittent behavior
5
Step 5: Check for software updates or service campaigns; replace telematics module if hardware failure is confirmed and reprogram/reactivate services
Estimated Repair Cost
$200 - $1,800
Parts + labor, varies by vehicle and location
The control module has detected invalid or corrupted data from the telematics control module. This affects connected vehicle services, emergency calling, remote vehicle access, navigation, and vehicle tracking features.
The most common cause of U0499 (Invalid Data Received From Telematic Control Module) is: Failed telematics control module or internal modem/GPS hardware failure
Typical repair costs for U0499 range from $200 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Moderate safety concern. Emergency calling features (e.g., automatic crash notification, SOS) may be unavailable. Navigation and stolen vehicle tracking will not function.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0499 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Network
System
Telematics/Connected Vehicle Services
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
