AutoCodes – Buick – U1512 Buick

U1512 Buick Code - Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus

Quick Answer

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Right Headlamp, Right Headlamp harness is open or shorted, Right Headlamp circuit poor electrical connection. 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: U1512 Buick indicates Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus.
Common causes: Common causes include Faulty Right Headlamp, Right Headlamp harness is open or shorted, Right Headlamp circuit poor electrical connection.
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 Popularity 1,289

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1512 Buick Description

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to Headlamp Control Module/Headlamp Leveling Control Module from Right Headlamp has not been received.

OBDII Code U1512 Buick - Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus - AutoCodes.com — U1512 Buick Code - Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1512 Buick?

Faulty Right Headlamp
Right Headlamp harness is open or shorted
Right Headlamp circuit poor electrical connection
Faulty Headlamp Control Module/Headlamp Leveling Control Module

How to Fix the DTC U1512 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1512 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U1512 Buick Code

1. What does the OBDII code U1512 mean on a Buick?

U1512 indicates that the Headlamp Control Module or Headlamp Leveling Control Module has lost communication with the right headlamp via the LIN (Local Interconnect Network) bus.

2. What are the symptoms of the U1512 code?

Common symptoms include a non-functioning or flickering right headlamp, a warning light on the dashboard, or improper headlamp leveling.

3. What causes the U1512 code on a Buick?

This code is typically caused by a faulty right headlamp assembly, damaged wiring or connectors, a failing LIN bus communication line, or a malfunctioning Headlamp Control Module.

4. Is the U1512 code a serious issue?

While it may not immediately affect drivability, it can impact visibility during nighttime driving or adverse weather, making it a safety concern.

5. How can I diagnose the U1512 code?

Start by inspecting the right headlamp wiring and connectors for damage or corrosion. Use a scan tool to check for additional LIN bus communication issues and test the Headlamp Control Module.

6. Can I fix the U1512 code myself?

If the issue is due to loose wiring or a corroded connector, you may be able to fix it yourself. For more complex issues like module failure, professional diagnosis and repair are recommended.

7. Does the U1512 code always mean the right headlamp is faulty?

No, the code could also indicate a problem with the LIN bus communication line, the Headlamp Control Module, or related wiring and connectors.

8. How much does it cost to repair the U1512 code?

Repair costs vary depending on the issue. Replacing a headlamp assembly can cost $200â€“$500, while module or wiring repairs may range from $100â€“$300.

9. Can a software update fix the U1512 code?

In some cases, a software update for the Headlamp Control Module might resolve communication errors. Consult your dealer or repair shop to confirm.

10. What tools are needed to troubleshoot the U1512 code?

Youâ€™ll need a scan tool capable of reading manufacturer-specific codes, a multimeter for testing wiring, and possibly a wiring diagram for your Buick model.