AutoCodes – Buick – U1154 Buick

U1154 Buick Code - Lost Communications With Rear Seat Entertainment Assembly

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Rear Seat Entertainment (RSE) Assembly, Rear Seat Entertainment Assembly harness is open or shorted, Rear Seat Entertainment Assembly 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: U1154 Buick indicates Lost Communications With Rear Seat Entertainment Assembly.
Common causes: Common causes include Faulty Rear Seat Entertainment (RSE) Assembly, Rear Seat Entertainment Assembly harness is open or shorted, Rear Seat Entertainment Assembly 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 468

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 Apr 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1154 Buick Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1154 is set.

OBDII Code U1154 Buick - Lost Communications With Rear Seat Entertainment Assembly - AutoCodes.com — U1154 Buick Code - Lost Communications With Rear Seat Entertainment Assembly

What does this mean?

What are the Possible Causes of the DTC U1154 Buick?

Faulty Rear Seat Entertainment (RSE) Assembly
Rear Seat Entertainment Assembly harness is open or shorted
Rear Seat Entertainment Assembly circuit poor electrical connection

How to Fix the DTC U1154 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 U1154 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 U1154 Buick Code

1. What are the common symptoms of OBDII code U1154 in a Buick related to lost communications with the rear seat entertainment assembly?

- The common symptoms include a non-functional rear seat entertainment system, no audio or video output, and error messages on the display.

2. What are some possible causes of OBDII code U1154 in a Buick indicating lost communications with the rear seat entertainment assembly?

- Possible causes include a faulty rear seat entertainment assembly unit, damaged wiring or connectors, a blown fuse, or a communication error within the vehicle's network.

3. How can I diagnose OBDII code U1154 in my Buick for lost communication with the rear seat entertainment assembly?

- Diagnosis can involve checking the rear entertainment unit for power and ground, inspecting the wiring and connectors for damage, and using a diagnostic scanner to communicate with the system and identify any faults.

4. Is it safe to continue driving my Buick with OBDII code U1154 related to lost communications with the rear seat entertainment assembly?

- It is generally safe to drive the vehicle, but it is recommended to address the issue to ensure proper functionality of the rear seat entertainment system and to prevent any potential electrical problems.

5. What are some repair tips for fixing OBDII code U1154 in a Buick due to lost communications with the rear seat entertainment assembly?

- Repair tips may include checking and replacing blown fuses, repairing or replacing damaged wiring or connectors, resetting the entertainment system, or reprogramming the vehicle's control module.

6. Can I reset OBDII code U1154 in my Buick related to lost communications with the rear seat entertainment assembly without fixing the underlying issue?

- While you can clear the code with a diagnostic scanner, it is important to address the root cause of the communication problem to prevent the code from reoccurring and ensure proper functionality of the entertainment system.

7. Are there any common mistakes to avoid when troubleshooting OBDII code U1154 in a Buick for lost communications with the rear seat entertainment assembly?

- Common mistakes include overlooking simple fixes like blown fuses, neglecting to check wiring and connectors for damage, and not properly diagnosing the communication network within the vehicle.

8. Do I need specialized tools to repair OBDII code U1154 in a Buick indicating lost communications with the rear seat entertainment assembly?

- While a diagnostic scanner is helpful for identifying the code and communicating with the vehicle's systems, basic tools like a multimeter, wiring diagram, and basic hand tools may be sufficient for troubleshooting and repairs.

9. Can extreme weather conditions or water damage cause OBDII code U1154 in a Buick related to lost communications with the rear seat entertainment assembly?

- Yes, exposure to extreme weather conditions, water damage, or moisture intrusion can potentially lead to communication issues with the rear seat entertainment assembly, triggering the U1154 trouble code.

10. Is it possible for a software glitch in the vehicle's control module to trigger OBDII code U1154 for lost communications with the rear seat entertainment assembly in a Buick?

- Yes, a software glitch or communication error within the vehicle's control module can cause disruptions in the communication network, leading to the U1154 trouble code related to the rear seat entertainment assembly.