Code result
U0198
Lost Communication with Telematic Control Module
Moderate severity
What it means
The vehicle has lost the telematics module (eCall / Connected Services / TCU). Emergency call, remote services and over-the-air features are unavailable until the module is back online.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
TCU unpowered or backup battery dead
highOne of the most commonly reported causes for this code — check this first.
Mobile antenna disconnected
lowLess common, but worth ruling out after the more likely causes.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
Related help
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