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U1345 Cadillac 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 Cadillac 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 2,865

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

What does this mean?

What are the Possible Causes of the DTC U1345 Cadillac?

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 Cadillac?

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 Cadillac 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 U1345 Cadillac Code

1. What are the common symptoms of OBDII code U1345 (Cadillac)?

- Common symptoms include engine misfires, rough idling, reduced engine performance, and potential illumination of the Check Engine Light.

2. What does OBDII code U1345 (Cadillac) indicate?

- This code indicates a problem with the Engine Control Module LIN Bus 1 communication circuit.

3. What are possible causes of OBDII code U1345 (Cadillac)?

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

4. How can I diagnose OBDII code U1345 (Cadillac)?

- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the LIN Bus circuit for damage, and testing the ECM and related components for proper function.

5. Can I still drive my Cadillac with OBDII code U1345?

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

6. How can I repair OBDII code U1345 (Cadillac)?

- Repair may involve repairing or replacing damaged wiring, connectors, or components in the LIN Bus circuit, or replacing the faulty Engine Control Module if necessary.

7. Are there any DIY repair tips for OBDII code U1345 (Cadillac)?

- DIY repair tips include carefully inspecting the LIN Bus wiring for visible damage, ensuring connectors are properly seated, and consulting the vehicle's service manual for specific troubleshooting steps.

8. How much does it cost to fix OBDII code U1345 (Cadillac) at a repair shop?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay for diagnostic time, parts, and labor, which can range from a few hundred to over a thousand dollars.

9. Can a faulty sensor trigger OBDII code U1345 (Cadillac)?

- While a faulty sensor may indirectly affect the LIN Bus communication, the primary triggers for this code are related to issues within the Engine Control Module LIN Bus 1 circuit itself.

10. How long does it take to repair OBDII code U1345 (Cadillac)?

- The repair time can vary based on the complexity of the issue and the availability of parts, but it typically takes a few hours to a full day to diagnose and fix the problem.