AutoCodes – Generic – U054B

U054B Code - Invalid Data Received From Interior Lighting Control Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Interior Lighting Control Module, Interior Lighting Control Module harness is open or shorted, Interior Lighting 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: U054B indicates Invalid Data Received From Interior Lighting Control Module.
Common causes: Common causes include Faulty Interior Lighting Control Module, Interior Lighting Control Module harness is open or shorted, Interior Lighting 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 1,477

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U054B Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Interior Lighting Control Module causing its integrity to be questioned.

OBDII Code U054B - Invalid Data Received From Interior Lighting Control Module - AutoCodes.com — U054B Code - Invalid Data Received From Interior Lighting Control Module

What does this mean?

What are the Possible Causes of the DTC U054B?

Faulty Interior Lighting Control Module
Interior Lighting Control Module harness is open or shorted
Interior Lighting Control Module circuit poor electrical connection

How to Fix the DTC U054B?

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 U054B 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 U054B Code

1. What does OBDII code U054B mean?

Code U054B indicates that the vehicle's control modules have detected invalid or corrupted data from the interior lighting control module.

2. What are the common symptoms of code U054B?

Symptoms may include malfunctioning interior lights, dim or flickering lights, dashboard warnings, or no noticeable issues depending on the vehicle.

3. What causes code U054B to appear?

Common causes include a faulty interior lighting control module, damaged wiring or connectors, software glitches, or issues with the CAN (Controller Area Network) communication system.

4. Can I drive my car with a U054B code?

Yes, in most cases, you can still drive the vehicle, but the interior lighting may not function properly. Itâ€™s best to address the issue to avoid further complications.

5. How do I diagnose code U054B?

Start by checking the wiring and connectors for damage or corrosion. Use a scan tool to monitor the communication between modules and test the interior lighting control module for proper operation.

6. How is code U054B fixed?

Repairs may involve replacing a faulty interior lighting control module, repairing or replacing damaged wiring, or updating the vehicle's software.

7. Can a dead battery cause code U054B?

Yes, a weak or dead battery can cause communication errors between modules, including code U054B. Always check the battery voltage as part of your diagnosis.

8. Will clearing the code fix U054B permanently?

Clearing the code may temporarily reset the system, but the underlying issue, such as a faulty module or wiring problem, must be addressed to prevent the code from returning.

9. How much does it cost to repair a U054B code?

Repair costs vary depending on the root cause. Replacing a module can cost $200-$600 or more, while fixing wiring issues may cost less if theyâ€™re minor.

10. Can a software update resolve a U054B code?

In some cases, a software update for the vehicle's control modules can resolve communication issues that trigger this code. Check with your dealership or manufacturer for updates.