U0191

Universal

Lost Communication With Television

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Low Severity

The vehicle has detected that it cannot communicate with a television-related module over its electronic network. If the vehicle has this equipment, television or related infotainment features may not work. The code identifies a communication problem, not proof that the module itself has failed.

Report an error with this code

⚠️ Before You Begin (Safety First)

This code alone does not usually indicate an immediate driving hazard. Avoid interacting with infotainment controls while driving. Stop safely if the vehicle also shows warnings or symptoms affecting essential driving or safety systems.

Common Symptoms

  • Television or related infotainment features may be unavailable if the vehicle is equipped with them.
  • A display or control associated with the television system may not respond if it depends on communication with the affected module.
  • Related network or infotainment warnings may appear, depending on the vehicle.
  • There may be no noticeable symptoms if the system is not fitted, is not currently in use, or the communication interruption does not affect visible functions.

Common Causes

  • The television-related module may have lost power or ground.
  • A loose, damaged, or corroded connector or wiring may interrupt communication.
  • A fault elsewhere on the vehicle communication network may prevent the module from responding.
  • The module itself may have an internal fault, but the code alone does not confirm this.
  • Vehicle configuration or software issues may affect whether the module is expected to communicate.

Diagnostic Steps

  1. Check the owner’s manual or vehicle equipment information to see whether the vehicle has a television-related system; equipment and code applicability vary by model, year, and engine.
  2. Note whether television or related infotainment features are unavailable and whether any other network or module warnings are present.
  3. With the vehicle safely parked, check accessible connectors and wiring for visible looseness or damage. Do not disconnect components unless the vehicle-specific instructions say it is safe.
  4. If checking a fuse is appropriate for the vehicle, use the owner’s manual to identify the correct fuse and follow its safety instructions; do not substitute a different fuse rating.
  5. Have a qualified technician scan all modules and test the relevant power, ground, and communication circuits if the problem persists.

When to Call a Professional

Confirm the vehicle is equipped with the relevant television system, then scan all modules for communication codes and check whether the television-related module responds. Use the vehicle-specific wiring information to inspect its power, ground, connectors, and network circuits. Check for related network faults before considering module replacement.

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Commonly Asked Questions

Does U0191 prove that the television module needs replacement?

No. It indicates lost communication, which can also result from power, ground, wiring, connector, network, or configuration problems. Diagnosis is needed before replacing a module.

Can this code appear if my vehicle does not have a television system?

Equipment and code applicability depend on the vehicle. Confirm its installed features and configuration before diagnosing a television-related module.

Can I keep driving with U0191?

The code alone generally concerns communication with an infotainment-related system rather than a driving function. Avoid using infotainment controls while moving, and take other warnings or safety-related symptoms seriously.

What should be checked before replacing parts?

A technician should check whether the module is expected to be present, scan other modules for related communication faults, and inspect the module’s power, ground, connectors, and network circuits using vehicle-specific information.

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