AutoCodes – GMC – U1502 GMC

U1502 GMC Code - Local Interconnect Network Bus Failure

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 Module that is not communicating, Module harness is open or shorted, Module 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: U1502 GMC indicates Local Interconnect Network Bus Failure.
Common causes: Common causes include Faulty Module that is not communicating, Module harness is open or shorted, Module 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 863

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 May 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1502 GMC 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 that includes the transmitter device availability has not been received.

OBDII Code U1502 GMC - Local Interconnect Network Bus Failure - AutoCodes.com — U1502 GMC Code - Local Interconnect Network Bus Failure

What does this mean?

What are the Possible Causes of the DTC U1502 GMC?

Faulty Module that is not communicating
Module harness is open or shorted
Module circuit poor electrical connection

How to Fix the DTC U1502 GMC?

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 U1502 GMC 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.

Need more information about the U1502 GMC code?

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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 U1502 GMC Code

1. What are the common symptoms of OBDII code U1502 GMC (Local Interconnect Network Bus Failure)?

- Common symptoms include issues with the vehicle's communication network, such as problems with the instrument cluster, radio, or other electronic modules.

2. What can cause the U1502 GMC code to appear?

- The U1502 code usually indicates a communication failure on the Local Interconnect Network (LIN) bus, which can be caused by wiring issues, faulty modules, or a malfunction in the LIN bus itself.

3. How can I diagnose the U1502 code in my GMC vehicle?

- Diagnosis involves using a professional OBDII scanner to read the code and perform further testing to pinpoint the exact cause of the LIN bus failure.

4. Are there any common repair tips for fixing the U1502 GMC code?

- Repair tips may include checking for loose or damaged wiring connections, inspecting and testing the various modules on the LIN bus, and ensuring proper voltage supply to the network.

5. Can the U1502 code be cleared/reset, or does it require immediate repair?

- The code can be cleared, but it is advisable to address the underlying issue causing the communication failure to prevent any further problems with the vehicle's electronic systems.

6. Is the U1502 code specific to certain GMC models or can it occur in other vehicles?

- While the U1502 code is specific to GMC vehicles, similar communication bus failure codes may be present in other vehicle makes and models.

7. What are the risks of ignoring the U1502 GMC code?

- Ignoring the U1502 code can lead to further malfunctions in the vehicle's electronic systems, potentially causing safety hazards or affecting the overall performance of the vehicle.

8. Are there any recalls or technical service bulletins related to the U1502 code?

- It is recommended to check with GMC dealerships or online resources for any recalls or technical service bulletins related to the U1502 code to see if there are known issues or solutions.

9. Can a DIY enthusiast repair the U1502 code, or is it best left to professional mechanics?

- While some basic checks and repairs can be done by DIY enthusiasts, diagnosing and fixing the U1502 code may require advanced tools and expertise, so it is recommended to consult a professional mechanic.

10. How much does it typically cost to repair the U1502 GMC code?

- The cost of repairing the U1502 code can vary depending on the root cause of the issue, the specific GMC model, and whether any parts need to be replaced. It is best to get a diagnosis and estimate from a qualified mechanic.