AutoCodes – Buick – U1515 Buick

U1515 Buick Code - Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus

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 Left Windshield Wiper Motor/Windshield Wiper Motor Module, Left Windshield Wiper Motor/Windshield Wiper Motor Module harness is open or shorted, Left Windshield Wiper Motor/Windshield Wiper Motor 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: U1515 Buick indicates Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus.
Common causes: Common causes include Faulty Left Windshield Wiper Motor/Windshield Wiper Motor Module, Left Windshield Wiper Motor/Windshield Wiper Motor Module harness is open or shorted, Left Windshield Wiper Motor/Windshield Wiper Motor 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 528

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1515 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) will set when a supervised periodic message to the Body Control Module (BCM) from Left Windshield Wiper Motor/Windshield Wiper Motor Module has not been received.

OBDII Code U1515 Buick - Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus - AutoCodes.com — U1515 Buick Code - Body Control Module Lost Communication With Left Windshield Wiper Motor/Windshield Wiper Motor Module On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U1515 Buick?

Faulty Left Windshield Wiper Motor/Windshield Wiper Motor Module
Left Windshield Wiper Motor/Windshield Wiper Motor Module harness is open or shorted
Left Windshield Wiper Motor/Windshield Wiper Motor Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U1515 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 U1515 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.

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Need Help with the 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 U1515 Buick Code

1. What does the OBDII code U1515 mean on a Buick?

The U1515 code indicates the Body Control Module (BCM) has lost communication with the left windshield wiper motor or the windshield wiper motor module on the LIN (Local Interconnect Network) bus.

2. What are the common symptoms of the U1515 code?

Symptoms may include non-functional or erratic windshield wipers, a warning light on the dashboard, or intermittent communication issues with the wiper system.

3. What causes the U1515 code to appear?

Common causes include a faulty windshield wiper motor, damaged LIN bus wiring, poor electrical connections, or a malfunctioning Body Control Module (BCM).

4. Can I still drive my Buick with the U1515 code?

While the vehicle may still be drivable, impaired windshield wipers can compromise visibility and make driving unsafe, especially in bad weather conditions.

5. How is the U1515 code diagnosed?

A mechanic will typically use a scan tool to check for the code, inspect the LIN bus wiring and connections, and test the functionality of the wiper motor and BCM.

6. What repairs can fix the U1515 code?

Repairs may include replacing the windshield wiper motor, repairing or replacing damaged wiring, cleaning or securing electrical connections, or reprogramming or replacing the BCM.

7. Can a blown fuse cause the U1515 code?

Yes, a blown fuse related to the wiper motor or BCM can disrupt communication and trigger the U1515 code.

8. How much does it cost to fix the U1515 code on a Buick?

Repair costs vary depending on the issue, but replacing a windshield wiper motor typically costs $200â€“$400, while BCM repairs or programming can range from $300â€“$800.

9. Can I clear the U1515 code without fixing the problem?

Clearing the code without addressing the underlying issue will likely result in the code returning and the problem persisting.

10. Is the U1515 code specific to Buicks?

While the code can appear on other vehicles, the exact description and components affected may be specific to Buick models. Always refer to your vehicleâ€™s service manual for guidance.