AutoCodes – Buick – U1345 Buick

U1345 Buick Code - Engine Control Module LIN Bus 1

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 Control Module Setting the Diagnostic Trouble Code (DTC), Control Module harness is open or shorted, Control 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: U1345 Buick indicates Engine Control Module LIN Bus 1.
Common causes: Common causes include Faulty Control Module Setting the Diagnostic Trouble Code (DTC), Control Module harness is open or shorted, Control 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 2,682

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 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1345 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) sets when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U1345 Buick - Engine Control Module LIN Bus 1 - AutoCodes.com — U1345 Buick Code - Engine Control Module LIN Bus 1

What does this mean?

What are the Possible Causes of the DTC U1345 Buick?

Faulty Control Module Setting the Diagnostic Trouble Code (DTC)
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U1345 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 U1345 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.

Need more information about the U1345 Buick code?

Need more information on how to fix the U1345 Buick code? Get Access to Factory Service Manuals

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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 U1345 Buick Code

1. What are the common symptoms of OBDII code U1345 in a Buick related to the Engine Control Module LIN Bus 1?

- Common symptoms include the check engine light illuminating, loss of communication with the engine control module, and potential issues with vehicle performance.

2. What are some possible causes of OBDII code U1345 in a Buick?

- Possible causes can include a faulty engine control module LIN bus circuit, damaged wiring or connectors, or a malfunctioning engine control module itself.

3. How can I diagnose the cause of OBDII code U1345 in my Buick?

- Diagnosis typically involves using a scan tool to communicate with the affected module, checking the wiring and connectors for damage, and performing tests to pinpoint the issue.

4. Is it safe to continue driving my Buick with OBDII code U1345 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to potential performance issues and further damage if left unresolved.

5. Can I repair OBDII code U1345 in my Buick by myself?

- While some simple wiring or connector issues may be addressed by DIY enthusiasts, diagnosing and repairing complex issues related to this code often require professional help.

6. What are some tips for preventing OBDII code U1345 from appearing in my Buick?

- Regular maintenance, such as checking wiring integrity and keeping connectors clean, can help prevent issues leading to this code.

7. How much does it typically cost to repair OBDII code U1345 in a Buick?

- Repair costs can vary depending on the root cause of the issue, but expect to pay for diagnostic time, parts, and labor if you seek professional help.

8. Will resetting the OBDII code U1345 in my Buick make it go away permanently?

- Simply resetting the code without addressing the underlying issue will not make it go away permanently; the problem needs to be diagnosed and repaired for a lasting solution.

9. Can extreme weather conditions affect the likelihood of OBDII code U1345 appearing in a Buick?

- Extreme temperatures or moisture levels can potentially exacerbate underlying issues leading to this code, making it important to address any vulnerabilities in your vehicle's systems.

10. Are there any recalls or technical service bulletins related to OBDII code U1345 for Buick vehicles?

- It's advisable to check with your Buick dealership or manufacturer for any relevant recalls or technical service bulletins that may apply to your specific vehicle and issue.