U0198: Lost Communication With Telematic Control Module
LowNetwork/CommunicationCommunication Bus
What does U0198 mean?
U0198 is a diagnostic trouble code indicating "Lost Communication With Telematic Control Module". The vehicle's main computer has lost its ability to communicate with a specific module over the data bus. This could be caused by a wiring fault, a blown fuse, or a failed control module.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Possible issues with communication bus operation
- Vehicle may enter reduced power mode (limp mode)
Estimated repair cost
Typical range in Australia (parts + labour)
$200 – $1500 AUD
Common causes
- Failed control module
- CAN bus wiring fault or short
- Blown fuse to the affected module
- Water intrusion in a connector or module
- Battery voltage too low
What should you do?
This code sits in the climate, audio or convenience side of the car. It does not affect how the car drives or stops. Sort it at your next service unless it is bothering you enough to sort sooner.
Get a diagnosis for YOUR car
Code U0198 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.