AutoCodes – Chevrolet – U1345 Chevrolet

U1345 Chevrolet 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 Chevrolet 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 14,498

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

What does this mean?

What are the Possible Causes of the DTC U1345 Chevrolet?

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 Chevrolet?

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

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Get the U1345 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 Chevrolet Code

1. What does the OBDII code U1345 for a Chevrolet indicate?

The code U1345 specifically refers to a communication fault in the Engine Control Module LIN Bus 1.

2. What are common symptoms of a U1345 code in a Chevrolet?

Common symptoms include engine misfires, poor performance, stalling, and the illumination of the check engine light.

3. What are possible causes of the U1345 code in a Chevrolet?

Potential causes include damaged wiring or connectors in the LIN Bus network, a faulty Engine Control Module (ECM), or issues with other control modules on the LIN Bus.

4. How can I diagnose a U1345 code in my Chevrolet?

Diagnosis involves inspecting the LIN Bus wiring, connectors, and modules for damage, checking for loose connections, and using a scan tool to communicate with the ECM and other modules on the LIN Bus.

5. Can a U1345 code be fixed by resetting the ECM?

Simply resetting the ECM may temporarily clear the code, but it is important to address the root cause of the communication fault to prevent the code from reoccurring.

6. Is it safe to continue driving with a U1345 code in a Chevrolet?

Continuing to drive with a U1345 code may lead to further damage or performance issues, so it is recommended to address the issue promptly to avoid potential problems.

7. Are there any common repair tips for fixing a U1345 code?

Repair tips may include checking and repairing damaged wiring, ensuring proper connections, and potentially replacing the Engine Control Module if deemed faulty.

8. Can a DIY enthusiast fix a U1345 code in a Chevrolet?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair a U1345 code, but complex electrical issues may require professional assistance.

9. How much does it typically cost to repair a U1345 code in a Chevrolet?

The cost of repairing a U1345 code can vary based on the underlying issue, but it may involve expenses for parts replacement, labor, and diagnostic services.

10. Will a U1345 code cause damage to the engine in a Chevrolet?

While the U1345 code itself does not directly cause engine damage, unresolved communication faults can lead to performance issues that may impact the engine over time.