U172A Buick Code - Left High Beam Control Module Lost Communication With Left Headlamp Horizontal Motor
Quick Answer
The U172A Buick diagnostic trouble code indicates that the left high beam control module has lost communication with the left headlamp horizontal motor. Common causes include Faulty high beam control module, Malfunctioning headlamp horizontal motor, Wiring or connection issues between the module and motor. 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
- U172A Buick indicates Left High Beam Control Module Lost Communication With Left Headlamp Horizontal Motor.
- Common causes
- Common causes include Faulty high beam control module, Malfunctioning headlamp horizontal motor, Wiring or connection issues between the module and motor.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code U172A Buick Description
The U172A Buick diagnostic trouble code indicates that the left high beam control module has lost communication with the left headlamp horizontal motor. In modern vehicles, various modules and sensors communicate with each other to ensure proper functioning of different systems. In this case, the high beam control module is responsible for controlling the high beam headlights, while the headlamp horizontal motor adjusts the horizontal position of the headlamp.
Common Causes of U172A Buick
- Faulty high beam control module
- Malfunctioning headlamp horizontal motor
- Wiring or connection issues between the module and motor
- Corrosion or damage to electrical components
- Software or communication error within the vehicle's system
Symptoms of U172A Buick
- High beam headlights not working properly
- Headlamp not adjusting horizontally
- Dashboard warning lights related to lighting system
- Flickering or inconsistent high beam operation
How to Fix U172A Buick
- Perform a thorough diagnostic scan to confirm the U172A code and identify the specific issue.
- Inspect the high beam control module and headlamp horizontal motor for any visible damage or signs of malfunction.
- Check the wiring and connections between the module and motor for any loose connections or corrosion.
- Test the communication between the module and motor to determine if there is a software or communication error.
- Replace the faulty high beam control module or headlamp horizontal motor if necessary, and ensure proper installation and programming.
Cost to Fix U172A Buick
The typical repair costs for addressing the U172A Buick code can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this type of communication error can range from $200 to $500, including parts and labor. However, it is important to note that prices can vary based on the location, vehicle make and model, and the rates of the auto repair shop. It is recommended to obtain a detailed estimate from a qualified mechanic to determine the exact cost for this repair.
Need more information about the U172A Buick code?
Need more information on how to fix the U172A Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U172A Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U172A Buick Code
1. What does the OBDII code U172A mean on a Buick?
The U172A code indicates that the Left High Beam Control Module has lost communication with the Left Headlamp Horizontal Motor.
2. What are the symptoms of the U172A code on a Buick?
Symptoms may include the left high beam not functioning properly, the headlight not adjusting horizontally, or a warning light on the dashboard.
3. What causes the U172A code to appear on a Buick?
Common causes include faulty wiring or connections, a malfunctioning Left High Beam Control Module, a defective Left Headlamp Horizontal Motor, or software issues.
4. Can I drive my Buick with the U172A code active?
Yes, but the left headlight's high beam or horizontal adjustment may not work, which could compromise visibility and safety, especially at night.
5. How do I diagnose the U172A code on a Buick?
Use a scan tool to confirm the code, inspect the wiring and connectors between the control module and the horizontal motor, and test the functionality of both components.
6. How can I fix the U172A code on my Buick?
Repairs may include reconnecting or replacing damaged wiring, updating the control module's software, or replacing the faulty Left Headlamp Horizontal Motor or Control Module.
7. How much does it cost to fix the U172A code on a Buick?
Costs can range from $50 to $500 depending on whether the issue is a simple wiring repair or if a major component like the control module or motor needs replacement.
8. Can a software update resolve the U172A code on a Buick?
In some cases, a software update for the Left High Beam Control Module can resolve communication issues and clear the code.
9. Is the U172A code covered under warranty?
It depends on your vehicle's warranty terms and coverage. Check with your Buick dealership for details.
10. What tools are needed to troubleshoot the U172A code on a Buick?
A scan tool capable of reading U-codes, a multimeter for checking electrical connections, and possibly a service manual for wiring diagrams are needed.
Discuss the causes and fixes for U172A Buick OBDII Code
Code U172A Buick comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.