U0198
NetworkModule Communicationmoderate severityLost Communication With Telematic Control Module
What U0198 Means
A control module lost communication with the telematics control module over the data bus. This can disable emergency calling, navigation, and connected services.
Symptoms
- Telematics services unavailable
- No emergency call or connected features
- Fault code stored
Common Causes
- Faulty telematics control module
- Wiring or connector fault
- Blown fuse or power loss to module
- Damaged data bus circuit
Diagnostic Steps
- Scan for related U-codes on all modules
- Check power and ground at telematics module
- Inspect bus wiring and connectors for damage
- Test module communication with scan tool
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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