U0191 GMC Code - Lost Communication With Television
Quick Answer
The U0191 code for GMC vehicles indicates that there is a communication issue between the vehicle's control module and the television system. Common causes include Faulty wiring connections between the control module and television system, Malfunctioning control module, Software glitches in the vehicle's infotainment system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U0191 GMC indicates Lost Communication With Television.
- Common causes
- Common causes include Faulty wiring connections between the control module and television system, Malfunctioning control module, Software glitches in the vehicle's infotainment system.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code U0191 GMC Description
The U0191 code for GMC vehicles indicates that there is a communication issue between the vehicle's control module and the television system. This code typically affects vehicles equipped with telematics systems that allow for entertainment features such as TV display. When this communication is lost, it can lead to a loss of functionality in the television system, causing inconvenience for the driver and passengers.
Common Causes of U0191 GMC
- Faulty wiring connections between the control module and television system
- Malfunctioning control module
- Software glitches in the vehicle's infotainment system
- Damaged television display unit
- Water damage or corrosion in the electrical components
Symptoms of U0191 GMC
- Non-responsive television display
- No audio output from the television system
- Navigation system not functioning properly
- Error messages related to the television system
- Loss of control over entertainment features
How to Fix U0191 GMC
- Begin by conducting a visual inspection of the wiring connections between the control module and television system to check for any loose or damaged wires.
- Use a diagnostic scanner to reset the control module and clear the U0191 code from the vehicle's system.
- Test the television system to ensure that it is receiving signals and functioning properly.
- If the issue persists, consider replacing the control module or television display unit, depending on which component is found to be faulty.
- Finally, retest the system to confirm that the communication between the control module and television system has been restored.
Cost to Fix U0191 GMC
The cost of repairing the U0191 code can vary depending on the specific cause of the communication loss and the necessary repairs. On average, the cost of parts and labor for this issue can range from $200 to $500. However, it's important to note that prices may fluctuate based on factors such as location, vehicle make and model, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can impact the overall cost, with rates typically ranging between $80 and $150 per hour. It's recommended to consult with a professional mechanic for a more accurate estimate tailored to your specific vehicle.
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Frequently Asked Questions about U0191 GMC Code
1. What does the OBDII code U0191 mean on a GMC?
The U0191 code indicates a loss of communication with the Telematics Control Module (TCM), often referred to as the "Television" in certain vehicle diagnostics.
2. What are common symptoms of the U0191 code on a GMC?
Symptoms can include a non-functional OnStar system, inoperative navigation or infotainment features, and warning lights on the dashboard.
3. What causes the U0191 code to appear on a GMC?
The code is typically caused by faulty wiring, a damaged Telematics Control Module, a blown fuse, or a network communication error within the vehicle.
4. Can a weak battery cause the U0191 code on a GMC?
Yes, a weak or failing battery can disrupt communication between modules and trigger the U0191 code.
5. How can I diagnose the U0191 code on a GMC?
Start by checking the wiring and connectors for damage, inspecting the fuses, and using a scan tool to monitor communication between modules.
6. Is it safe to drive with the U0191 code on a GMC?
In most cases, the vehicle is still drivable, but key features like emergency communication or navigation may not work properly.
7. How do I fix the U0191 code on a GMC?
Repairs may involve replacing damaged wiring, reconnecting loose connectors, replacing the Telematics Control Module, or updating module software.
8. Can a software update fix the U0191 code on a GMC?
Yes, in some cases, a software update for the affected module can resolve communication issues.
9. How much does it cost to repair the U0191 code on a GMC?
Repair costs can range from $100 for simple wiring repairs to $1,000 or more if the Telematics Control Module needs replacement.
10. Can I clear the U0191 code on a GMC without fixing the issue?
You can clear the code with a scan tool, but it will likely return if the underlying problem is not resolved.
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