AutoCodes – Buick – U155D Buick

U155D Buick Code - Body Control Module Lost Communication With Right Rear Seat Heating/Venting/Cooling Switch 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 Right Rear Seat Heating/Venting/Cooling Switch, Right Rear Seat Heating/Venting/Cooling Switch harness is open or shorted, Right Rear Seat Heating/Venting/Cooling Switch 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: U155D Buick indicates Body Control Module Lost Communication With Right Rear Seat Heating/Venting/Cooling Switch On LIN Bus.
Common causes: Common causes include Faulty Right Rear Seat Heating/Venting/Cooling Switch, Right Rear Seat Heating/Venting/Cooling Switch harness is open or shorted, Right Rear Seat Heating/Venting/Cooling Switch 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 485

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 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U155D 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 the Right Rear Seat Heating/Venting/Cooling Switch has not been received.

OBDII Code U155D Buick - Body Control Module Lost Communication With Right Rear Seat Heating/Venting/Cooling Switch On LIN Bus - AutoCodes.com — U155D Buick Code - Body Control Module Lost Communication With Right Rear Seat Heating/Venting/Cooling Switch On LIN Bus

What does this mean?

What are the Possible Causes of the DTC U155D Buick?

Faulty Right Rear Seat Heating/Venting/Cooling Switch
Right Rear Seat Heating/Venting/Cooling Switch harness is open or shorted
Right Rear Seat Heating/Venting/Cooling Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC U155D 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 U155D 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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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 U155D Buick Code

1. What are the common symptoms of OBDII code U155D in a Buick related to the Body Control Module losing communication with the right rear seat heating/cooling switch?

- Common symptoms include malfunctioning right rear seat heating/cooling functions, such as the inability to control temperature settings or seat ventilation.

2. What are the possible causes of OBDII code U155D in a Buick indicating a communication issue with the right rear seat heating/cooling switch?

- Possible causes may include a faulty right rear seat heating/cooling switch, damaged wiring or connectors, or a malfunctioning Body Control Module.

3. How can I diagnose the source of the communication problem between the Body Control Module and the right rear seat heating/cooling switch in my Buick?

- Diagnose the issue by checking the wiring and connectors for any visible damage, testing the right rear seat heating/cooling switch functionality, and using a scan tool to communicate with the Body Control Module.

4. Can a DIY enthusiast repair the communication problem indicated by OBDII code U155D in a Buick, or is professional assistance recommended?

- Depending on the underlying cause of the communication issue, a DIY enthusiast may be able to repair it by checking and fixing wiring or replacing the right rear seat heating/cooling switch. However, for complex issues with the Body Control Module, professional assistance is recommended.

5. Are there any reset procedures that can be attempted to clear OBDII code U155D in a Buick after resolving the communication problem with the right rear seat heating/cooling switch?

- Clearing the code can often be achieved by using a scan tool to reset the Body Control Module after addressing the communication problem with the right rear seat heating/cooling switch.

6. Is it safe to continue driving a Buick with OBDII code U155D related to the Body Control Module losing communication with the right rear seat heating/cooling switch?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the communication issue promptly to ensure proper functioning of the right rear seat heating/cooling system.

7. Can extreme weather conditions or moisture exposure contribute to the occurrence of OBDII code U155D in a Buick?

- Yes, extreme weather conditions or moisture exposure can potentially lead to communication issues between the Body Control Module and the right rear seat heating/cooling switch, triggering OBDII code U155D.

8. How can regular maintenance help prevent OBDII code U155D from occurring in a Buick due to communication problems with the right rear seat heating/cooling switch?

- Regularly inspecting the wiring and connectors, keeping the interior of the vehicle dry, and ensuring the right rear seat heating/cooling system is functioning properly can help prevent communication issues that trigger OBDII code U155D.

9. Are there any recalls or service bulletins related to OBDII code U155D in Buick vehicles experiencing communication problems with the right rear seat heating/cooling switch?

- It is recommended to check with the manufacturer or authorized service centers for any recalls or service bulletins related to OBDII code U155D and communication issues with the right rear seat heating/cooling switch in Buick vehicles.

10. Can a disconnected or malfunctioning battery lead to the appearance of OBDII code U155D indicating a communication problem with the right rear seat heating/cooling switch in a Buick?

- Yes, a disconnected or malfunctioning battery can sometimes cause communication issues between the Body Control Module and the right rear seat heating/cooling switch, triggering OBDII code U155D.