AutoCodes – Generic – U1054

U1054 Code - Invalid or Missing Data For Primary Id

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Module that is not communicating, Module harness is open or shorted, 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: U1054 indicates Invalid or Missing Data For Primary Id.
Common causes: Common causes include Faulty Module that is not communicating, Module harness is open or shorted, 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 9,096

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 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1054 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 State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, the Diagnostic Trouble Code (DTC) is set.

OBDII Code U1054 - Invalid or Missing Data For Primary Id - AutoCodes.com — U1054 Code - Invalid or Missing Data For Primary Id

What does this mean?

What are the Possible Causes of the DTC U1054?

Faulty Module that is not communicating
Module harness is open or shorted
Module circuit poor electrical connection

How to Fix the DTC U1054?

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 U1054 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.

Need more information about the U1054 code?

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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 U1054 Code

1. What does the OBDII code U1054 mean?

The U1054 code indicates that there is an issue with the communication or data sharing between the vehicle's primary control module and other control modules. This results in invalid or missing data for primary identification.

2. What are the common symptoms of code U1054?

Symptoms can include the illumination of the check engine light, other warning lights on the dashboard, vehicle performance issues, or possibly no noticeable symptoms at all.

3. What causes the U1054 code to be triggered in a vehicle?

Possible causes include faulty electrical connections, a malfunctioning control module, issues with the vehicle's wiring, or a problem with the CAN (Controller Area Network) bus.

4. How can I diagnose the U1054 code in my vehicle?

Diagnosis should begin with a thorough inspection of all related wiring and connectors for damage or loose connections. A scan tool should be used to monitor live data and verify the issue. Checking the health of the relevant control modules is also crucial.

5. What are the steps to fix the U1054 code?

Repair steps may include repairing or replacing damaged wiring or connectors, replacing faulty control modules after proper testing, and ensuring all connections within the CAN network are secure and functional.

6. Is it safe to drive a vehicle with the U1054 code?

While it might be possible to drive a vehicle with this code, it is not recommended as it indicates a potential malfunction in critical communication systems, which could affect vehicle performance and safety.

7. Can the U1054 code affect the vehicleâ€™s fuel efficiency?

Yes, if the U1054 code is due to an issue in the communication network that involves the engine control module, it might indirectly affect fuel efficiency by impacting the overall performance of the engine management system.

8. How urgent is it to address the U1054 code?

Addressing the U1054 code should be considered urgent because communication problems within the vehicleâ€™s control modules can lead to further complications or failures in various systems.