U0191
Lost Communication with Television Tuner Module
The Television Tuner Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. The TV tuner is unreachable. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
The Television Tuner Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. The TV tuner is unreachable. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
Common causes
- high
TV tuner unpowered
One of the most commonly reported causes for this code — check this first.
Typical part cost: $60-660
- medium
CAN wiring to TV tuner broken
A plausible cause — test and verify before replacing parts.
Typical part cost: $60-660
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does U0191 mean?
U0191 means "Lost Communication with Television Tuner Module". It is a generic OBD-II code that points to a fault in the network / communication.
What are the most common causes of U0191?
tv tuner unpowered; can wiring to tv tuner broken; gateway module routing can messages incorrectly — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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