AutoCodes – Generic – U1514

U1514 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: U1514 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 9,020

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 U1514 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 U1514 - Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus - AutoCodes.com — U1514 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 U1514?

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 U1514?

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 U1514 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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Information for Specific Makes

U1514 Buick — Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus
U1514 Cadillac — Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus
U1514 Chevrolet — Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus
U1514 GMC — Headlamp Control Module/Headlamp Leveling Control Module Lost Communication With Right Headlamp On LIN Bus

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 U1514 Code

1. What are common symptoms of OBDII code U1514?

- Common symptoms include malfunctioning right headlamp, erratic headlamp leveling, and dashboard warning lights related to headlamp control.

2. What does the OBDII code U1514 indicate?

- The code U1514 indicates that the Headlamp Control Module or Headlamp Leveling Control Module has lost communication with the right headlamp on the LIN bus.

3. What are possible causes of code U1514?

- Possible causes include loose or damaged wiring connections, a faulty headlamp control module, a malfunctioning headlamp leveling control module, or a communication error on the LIN bus network.

4. How can I diagnose the cause of code U1514?

- Diagnosis typically involves checking the wiring connections for damage, testing the modules for functionality, and using a diagnostic tool to scan the LIN bus network for communication issues.

5. Can I still drive my vehicle with code U1514?

- It is not recommended to drive your vehicle with code U1514 active, as it may affect the proper functioning of the right headlamp and headlamp leveling system, compromising visibility and safety.

6. How can I repair OBDII code U1514?

- Repairing code U1514 may involve fixing wiring connections, replacing the headlamp control module or headlamp leveling control module, or reprogramming the modules for proper communication.

7. Is it possible to reset code U1514 without repair?

- While clearing the code using an OBDII scanner may temporarily remove the warning light, the underlying issue causing code U1514 will likely persist until properly diagnosed and repaired.

8. Can extreme weather conditions trigger code U1514?

- Yes, extreme weather conditions such as heavy rain or snow can potentially cause moisture-related issues with the headlamp control system, leading to communication errors and triggering code U1514.

9. How long does it take to repair code U1514?

- The repair time for code U1514 can vary depending on the cause of the issue. Simple fixes like reconnecting loose wiring may take a short time, while replacing modules or extensive troubleshooting may require more time.

10. Are there any recalls related to OBDII code U1514?

- Check with your vehicle manufacturer or visit the National Highway Traffic Safety Administration website to see if there are any recalls related to OBDII code U1514 affecting your specific make and model.