U0198Network Communication

Lost Communication With Telematic Control Module

U0198 means a module lost communication with the telematics control module, which handles connected services such as emergency calling, remote features, and data connectivity.

🚗 Yes. Telematics and connected services may not work, but core driving functions are unaffected.

LOW

severity

🎯 Top Causes, Ranked by Likelihood

#1Wiring or connector fault to the module$50-$300

35%

Open or shorted wiring interrupts communication with the telematics module.

#2Failed telematics control module$200-$800

30%

An internal failure stops the module from communicating.

#3Poor power or ground to the module$50-$250

20%

Missing power or ground keeps the module offline.

#4Bus fault affecting the module$100-$500

15%

A network problem can drop the module off the bus.

🩺 Common Symptoms

Connected services not working
Emergency call feature disabled
Remote app features fail
Telematics warning message

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$300

Shop Cost

$150-$800

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose U0198

1Scan modules and confirm which are communicating

2Verify power and ground at the telematics module

3Inspect wiring and connectors to the module

4Test the bus signal reaching the module

❓ Frequently Asked Questions

Can I drive with U0198?

Yes. Only telematics and connected features are affected. Core driving is fine, but the feature will not work until fixed.

What does the telematics module do?

It provides connected services like emergency calling, remote start via app, and data connectivity.

What causes U0198?

Wiring or connector faults, a failed telematics module, or a power and ground problem.

🔗 Related Codes

U0155U0140U0121U0164