AutoCodes – GMC – U1505 GMC

U1505 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: U1505 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 822

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 U1505 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 U1505 GMC - Local Interconnect Network Bus Failure - AutoCodes.com — U1505 GMC Code - Local Interconnect Network Bus Failure

What does this mean?

What are the Possible Causes of the DTC U1505 GMC?

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

How to Fix the DTC U1505 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 U1505 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.

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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 U1505 GMC Code

1. What are the common symptoms of OBDII code U1505 GMC (Local Interconnect Network Bus Failure)?

- Common symptoms include issues with communication between modules, warning lights on the dashboard, and malfunctioning vehicle systems.

2. What are the possible causes of the U1505 GMC code?

- The U1505 code can be caused by a faulty local interconnect network (LIN) bus, damaged wiring or connectors, software issues, or a malfunctioning control module.

3. How can I diagnose the U1505 GMC code?

- Diagnosing the U1505 code involves using a professional OBDII scanner to retrieve the code, checking for other related codes, inspecting the LIN bus wiring and connectors, and performing a thorough system scan to pinpoint the issue.

4. Can I continue driving my vehicle with the U1505 code?

- It is not recommended to drive your vehicle with the U1505 code present, as it may lead to further electrical system issues and potential safety hazards. It is best to address the problem promptly.

5. How can I repair the U1505 GMC code?

- Repairing the U1505 code typically involves repairing or replacing damaged wiring or connectors, reprogramming control modules if necessary, and ensuring proper communication between modules on the LIN bus.

6. Is it possible to reset the U1505 code without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is important to address the root cause of the U1505 code to prevent it from reoccurring and potentially causing more significant problems.

7. Are there any DIY tips for fixing the U1505 GMC code?

- DIY tips may include visually inspecting the LIN bus wiring for damage, checking connectors for corrosion or loose connections, and ensuring all modules are properly communicating on the network.

8. Can a mechanic help with diagnosing and repairing the U1505 code?

- Yes, a qualified mechanic or dealership technician can assist in diagnosing and repairing the U1505 code using advanced diagnostic tools and expertise in automotive electronics.

9. Is the U1505 code specific to GMC vehicles only?

- The U1505 code is a generic OBDII code related to a Local Interconnect Network Bus Failure and can be found in various vehicle makes and models, not limited to GMC vehicles.

10. How much does it typically cost to repair the U1505 GMC code?

- The cost of repairing the U1505 code can vary depending on the extent of the issue, labor rates, and parts needed. It is recommended to obtain a diagnostic from a professional to get an accurate estimate.