AutoCodes – Chevrolet – U1154 Chevrolet

U1154 Chevrolet 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 Chevrolet 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 640

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

What does this mean?

What are the Possible Causes of the DTC U1154 Chevrolet?

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 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 U1154 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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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 Chevrolet Code

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

- Common symptoms include a non-functional rear seat entertainment system, blank screens, no audio output, or intermittent operation.

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

- Possible causes may include a faulty rear seat entertainment unit, loose or damaged wiring connections, a blown fuse, or a malfunctioning control module.

3. How can I diagnose the issue related to OBDII code U1154 in a Chevrolet for lost communications with the rear seat entertainment assembly?

- Diagnose the problem by checking the wiring connections, inspecting the fuse for the entertainment system, scanning for other related trouble codes, and testing the rear seat entertainment unit itself.

4. Are there any simple repair tips for resolving OBDII code U1154 in a Chevrolet due to lost communications with the rear seat entertainment assembly?

- Start by ensuring all wiring connections are secure and undamaged, check the fuse for the entertainment system, and reset the system by disconnecting the battery for a few minutes.

5. Can OBDII code U1154 in a Chevrolet be cleared/reset without addressing the issue with the rear seat entertainment assembly?

- While the code can be cleared temporarily, it is essential to address the root cause of the communication loss with the rear seat entertainment assembly to prevent the code from reoccurring.

6. Is it safe to continue driving a Chevrolet with OBDII code U1154 indicating lost communications with the rear seat entertainment assembly?

- It is generally safe to drive the vehicle with this code, but it is recommended to resolve the communication issue to ensure the proper functioning of the rear seat entertainment system.

7. Can a DIY enthusiast fix OBDII code U1154 in a Chevrolet related to lost communications with the rear seat entertainment assembly?

- Depending on the specific cause, DIY enthusiasts may be able to fix the issue by checking and repairing wiring connections, replacing a blown fuse, or resetting the system.

8. What is the typical cost of repairing OBDII code U1154 in a Chevrolet due to lost communications with the rear seat entertainment assembly?

- The cost of repair can vary significantly based on the root cause of the issue, ranging from a simple fuse replacement to a more complex repair involving the entertainment unit or control module.

9. How long does it usually take to repair OBDII code U1154 in a Chevrolet related to lost communications with the rear seat entertainment assembly?

- The repair time can vary depending on the specific cause of the communication loss, but it may take anywhere from a few minutes for a fuse replacement to a few hours for more involved troubleshooting and repairs.

10. Are there any recalls or technical service bulletins related to OBDII code U1154 in Chevrolet vehicles concerning lost communications with the rear seat entertainment assembly?

- It is advisable to check with Chevrolet dealerships or online resources for any recalls or technical service bulletins related to OBDII code U1154 to see if there are known issues or remedies provided by the manufacturer.